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HTML
!

CSS 

              
                body {
  margin: 0;
  padding: 0;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #506366;
}
.wrapper {
  width: 250px;
}
!

JS 

              
                
let shape,n;//shape pattern id and n counter
let sArray=[];
let snipe;
let feathers; 
function preload() {
  feathers = loadImage('https://assets.codepen.io/4559259/feathers.png');
  snipe = loadImage('https://assets.codepen.io/4559259/snipecropped.png')
}

function setup(){
createCanvas(windowWidth,windowHeight);//flexible canvas
  n=floor(random(3,5))
  angleMode(DEGREES)//degree mode
  shape=floor(random(0,8))//random shape ID
  background(0);//black background
  translate(width/2,height/2);//center at (0,0)
  textSet()//setup text
  createRules()//creates pattern
}
function textSet(){//words on screen
  textSize(20);
  fill(255)
  text("One",-width/2+20,-height/2+20)
  text("Two",width/100,-height/2+20)
  text("Three",-width/2+20,height/2-20)
  text("Four?", width/100,height/5)
  textSize(10);
  text("Click for a new pattern", width/100,height/3)
}
function mousePressed(){
  n=floor(random(3,5))
  setup();//run code when mouse is pressed for a new pattern
}
function createRules(){
  sArray= [];
  if (shape===0){
    shape1();
  } else if( shape ===1){
    shape2();
  } else if(shape===2){
   shape3();
  }else if(shape===3){
   shape4();
  }
  else if(shape===4){
   shape5();
  }else if(shape===5){
   shape6();
  }else if(shape===6){
   shape7()
   }else if(shape===7){
     shape8();
   }
}
function polygon(x, y, radius, npoints) { //from p5js.org
  let angle = 360 / npoints;
  beginShape();
  for (let a = 0; a < 360; a += angle) {
    let sx = x + cos(a) * radius;
    let sy = y + sin(a) * radius;
    vertex(sx, sy);
  }
  endShape(CLOSE);
}
function shape1(){ //square pattern blocks with growth
  p=min(width,height)/30;//size of squares
   for (let i=0;i<n;i++){
      for (let j=0;j<n;j++){
        sArray[i]=[round(random(0,1)),round(random(0,1))];
        if (sArray[i][0]===1){
          fill(145-10*i,240-i*j,275-30*j)
          //case1
          rect(-width/3+i%n*p,-height/3+j%n*p,p,p);
          //case2
          rect(width/6+i%n*p,-height/3+j%n*p,p,p);
          if(i%n===0 && sArray[i][1]===1){
            rect(width/6+i%n*p-p,-height/3+j%n*p,p,p);
          }
          if(i%n===n-1 && sArray[i][1]===1){
            rect(width/6+i%n*p+p,-height/3+j%n*p,p,p); 
          }
          if(j%n===0 && sArray[i][1]===1){
            rect(width/6+i%n*p,-height/3+j%n*p-p,p,p);
          }
          if(j%n===n-1 && sArray[i][1]===1){
            rect(width/6+i%n*p,-height/3+j%n*p+p,p,p); 
          }
          //case3
          rect(-width/3+i%n*p,height/6+j%n*p,p,p);
          if(i%n===0 && sArray[i][1]===1){
            rect(-width/3+i%n*p-p,height/6+j%n*p,p,p);
            rect(-width/3+i%n*p-2*p,height/6+j%n*p,p,p);
          }
          if(i%n===n-1 && sArray[i][1]===1){
            rect(-width/3+i%n*p+p,height/6+j%n*p,p,p);
            rect(-width/3+i%n*p+2*p,height/6+j%n*p,p,p); 
          }
          if(j%n===0 && sArray[i][1]===1){
            rect(-width/3+i%n*p,height/6+j%n*p-p,p,p);
            rect(-width/3+i%n*p,height/6+j%n*p-2*p,p,p);
          }
          if(j%n===n-1 && sArray[i][1]===1){
            rect(-width/3+i%n*p,height/6+j%n*p+p,p,p);
            rect(-width/3+i%n*p,height/6+j%n*p+2*p,p,p); 
          }
        }
      }
    }
}
function shape2(){ //hexagon growth pattern
  r=min(width,height)/40;
  for (let i=0;i<n;i++){
      for (let j=0;j<n;j++){
        sArray[i]=[round(random(0,1)),round(random(0,1))];
         fill(135-10*i,130-i*j,255-30*j)
        if (sArray[i][0]===1){
          x = r * j * 1.5;
          y = -r * 12 + r * sqrt(3) * i + r * j / 1.15;
          //case1
          polygon(-width/5-x,y-height/9,r,6);
          //case2
          polygon(width/5-x,y-height/9,r,6);
          if(i%n===0 && sArray[i][1]===1){
            y2 = -r * 12 + r * sqrt(3) * (i) + r * (j-2) / 1.15;
            polygon(width/5-x,y2-height/9,r,6);
          }
          if(i%n===n-1 && sArray[i][1]===1){
            y2 = -r * 12 + r * sqrt(3) * i + r * (j+2) / 1.15;
            polygon(width/5-x,y2-height/9,r,6);
          }
          if(j%n===0 && sArray[i][1]===1){
            x2 = r * (j+1) * 1.5;
            y2 = -r * 12 + r * sqrt(3) * (i) + r * (j+1) / 1.15;
            polygon(width/5+x2,y2-height/9,r,6);
          }
          if(j%n===n-1 && sArray[i][1]===1){
             x2 = r * (j+1) * 1.5;
             y2 = -r * 12 + r * sqrt(3) * (i) + r * (j+1) / 1.15;
             polygon(width/5-x2,y2-height/9,r,6);

          }
           //case3
          polygon(-width/5-x,height/3+y,r,6);
          if(i%n===0 && sArray[i][1]===1){
            y2 = -r * 12 + r * sqrt(3) * (i) + r * (j-2) / 1.15;
            polygon(-width/5-x,height/3+y2,r,6);
            y2 = -r * 12 + r * sqrt(3) * (i) + r * (j-4) / 1.15;
            polygon(-width/5-x,height/3+y2,r,6);
          }
          if(i%n===n-1 && sArray[i][1]===1){
            y2 = -r * 12 + r * sqrt(3) * i + r * (j+2) / 1.15;
            polygon(-width/5-x,height/3+y2,r,6);
            y2 = -r * 12 + r * sqrt(3) * i + r * (j+4) / 1.15;
            polygon(-width/5-x,height/3+y2,r,6);
          }
          if(j%n===0 && sArray[i][1]===1){
            x2 = r * (j+1) * 1.5;
            y2 = -r * 12 + r * sqrt(3) * (i) + r * (j+1) / 1.15;
            polygon(-width/5+x2,height/3+y2,r,6);
            x2 = r * (j+2) * 1.5;
            y2 = -r * 12 + r * sqrt(3) * (i) + r * (j+2) / 1.15;
            polygon(-width/5+x2,height/3+y2,r,6);
          }
          if(j%n===n-1 && sArray[i][1]===1){
             x2 = r * (j+1) * 1.5;
             y2 = -r * 12 + r * sqrt(3) * (i) + r * (j+1) / 1.15;
             polygon(-width/5-x2,height/3+y2,r,6);
            x2 = r * (j+2) * 1.5;
             y2 = -r * 12 + r * sqrt(3) * (i) + r * (j+2) / 1.15;
             polygon(-width/5-x2,height/3+y2,r,6);

          }
        }
      }
    }
}
function shape3(){//circles
   p=min(width,height)/70
   r=min(width,height)/60
   s=floor(random(3,5));
    theta = 360/s
    m=2
    for (let i=0;i<s;i++){
      sArray[i]=[round(random(0,1)),round(random(0,1))];
      fill(255-10*i,150-i*i,155-30*i)
        circle(-width/4+r*cos(theta*i),-height/4+r*sin(theta*i),p);
        circle(width/4+r*cos(theta*i),-height/4+r*sin(theta*i),p);
        circle(-width/4+r*cos(theta*i),height/4+r*sin(theta*i),p);
        if (sArray[i][0]===1){
            //case1
            circle(-width/4+2*r*cos(theta*i),-height/4+2*r*sin(theta*i),p);
            //case2
            circle(width/4+2*r*cos(theta*i),-height/4+2*r*sin(theta*i),p);
            for(let k=3;k<=pow(m,2);k++){
            circle(width/4+k*r*cos(theta*i),-height/4+k*r*sin(theta*i),p);
            }
          //case3
            circle(-width/4+2*r*cos(theta*i),height/4+2*r*sin(theta*i),p);
              for(let k=3;k<=pow(m,2)+pow(m,2);k++){
                circle(-width/4+k*r*cos(theta*i),height/4+k*r*sin(theta*i),p);
            }
      }
    }
}
function shape4(){//triangles
   s=floor(random(3,5));
    theta = 360/s
    g=min(height,width)/30
    h=min(height,width)/60
    m=3
    for (let i=0;i<s;i++){
       sArray[i]=[round(random(0,1)),round(random(0,1))];
      fill(125-10*i,200-i*i,155-30*i)
        polygon(-width/4+g*cos(theta*i),-height/4+g*sin(theta*i),h,3);
        polygon(width/4+g*cos(theta*i),-height/4+g*sin(theta*i),h,3);
        polygon(-width/4+g*cos(theta*i),height/4+g*sin(theta*i),h,3);
        if (sArray[i][0]===1){
            //case1
            polygon(-width/4+2*g*cos(theta*i),-height/4+2*g*sin(i*theta),h,3);
            //case2
            polygon(width/4+2*g*cos(theta*i),-height/4+2*g*sin(i*theta),h,3);
            for(let k=2;k<=m;k++){
            polygon(width/4+k*g*cos(theta*i),-height/4+k*g*sin(i*theta),h,3);
            }
          //case3
            polygon(-width/4+2*g*cos(theta*i),height/4+2*g*sin(i*theta),h,3);
              for(let k=2;k<=m+1;k++){
                polygon(-width/4+k*g*cos(theta*i),height/4+k*g*sin(i*theta),h,3);
            }
      }
    }
}
function shape5(){//square tiles
  n=floor(random(3,6))
  s=min(width,height)/50;
  for (let i=0;i<n;i++){
      for (let j=0;j<n;j++){
        sArray[i]=[round(random(0,1)),round(random(0,1))];
        if (sArray[i][0]===1){
          fill(205-4*i,245,205-10*j*j)
          //case1
          rect(-width/2+i%n*s+width/10,-height/3+j%n*s,s,s);
          //case2
          rect(width/10+i%n*s,-height/3+j%n*s,s,s);
          push()
          translate(width/10+n*s,-height/3)
          rect(i%n*s,j%n*s,s,s);
          pop()
          rect(width/10+i%n*s,-height/3+j%n*s+n*s,s,s);
          rect(width/10+i%n*s+n*s,-height/3+j%n*s+n*s,s,s);
          //case3
          rect(-width/2+width/10+i%n*s,50+j%n*s,s,s);
          rect(-width/2+width/10+i%n*s+n*s,50+j%n*s,s,s);
          rect(-width/2+width/10+i%n*s,50+j%n*s+n*s,s,s);
          rect(-width/2+width/10+i%n*s+n*s,50+j%n*s+n*s,s,s);
          rect(-width/2+width/10+i%n*s+2*n*s,50+j%n*s,s,s);
          rect(-width/2+width/10+i%n*s,50+j%n*s+2*n*s,s,s);
          rect(-width/2+width/10+i%n*s+n*s,50+j%n*s+2*n*s,s,s);
          rect(-width/2+width/10+i%n*s+2*n*s,50+j%n*s+n*s,s,s);
          rect(-width/2+width/10+i%n*s+2*n*s,50+j%n*s+2*n*s,s,s);
          
        }
      }
  }
  
}
function shape6(){//turning 270s
   S=min(width,height)/20
  theta=45
  n=floor(random(4,6))
   for (let i=0;i<n;i++){
      for (let j=0;j<n;j++){
        sArray[i]=[round(random(0,1)),round(random(0,1))];
        //case1
        fill(125+10*i,200-i*j,205-30*j)
        arc(-width/3+i%n*S, -height/3+j%n*S, S, S, 0, 270);
        if (sArray[i][0]===1){
          //case1
          push()
          translate(50+i%n*S, -height/3+j%n*S)
          rotate(90)
          arc(0,0, S, S,0, 270);
          pop()
          push()
          translate(-width/3+i%n*S, 50+j%n*S)
          rotate(180)
          arc(0,0, S, S,0, 270);
          pop()
        }else{
          arc(50+i%n*S, -height/3+j%n*S, S, S,0,270);
          arc(-width/3+i%n*S, 50+j%n*S, S, S,0, 270);
        }
          
      }
   }
}
function shape7(){//turing 270s part 2
  S=min(width,height)/20
  theta=45
  n=floor(random(4,6))
  s=floor(random(1,4))
   for (let i=0;i<n;i++){
      for (let j=0;j<n;j++){
        sArray[i]=[round(random(0,1)),round(random(0,1))];
        //case1
        fill(25+10*i,100-i*j,255-30*j)
        arc(-width/3+i%n*S, -height/3+j%n*S, S, S, 0, 270);
        if (sArray[i][0]===1){
          //case1
          push()
          translate(50+i%n*S, -height/3+j%n*S)
          rotate(45*s)
          arc(0,0, S, S,0, 270);
          pop()
          push()
          translate(-width/3+i%n*S, 50+j%n*S)
          rotate(45*s*2)
          arc(0,0, S, S,0, 270);
          pop()
        }else{ 
          push()
          translate(50+i%n*S, -height/3+j%n*S)
          rotate(-45*s)
          arc(0,0, S, S,0, 270);
          pop()
          push()
          translate(-width/3+i%n*S, 50+j%n*S)
          rotate(-45*s*2)
          arc(0,0, S, S,0, 270);
          pop()
        }
          
      }
   }
}
function shape8(){//snipes
  //square tiles
  n=3;
  s=height/15;
  fill(255);
  for (let i=0;i<n-1;i++){
      for (let j=0;j<n;j++){
        sArray[i]=[round(random(0,2)),round(random(0,2)),round(random(0,2))];
        if (sArray[i][0]===1){
          img = snipe
        }else if(sArray[i][0]===0){
          img=feathers
        }
          //case1
          if(sArray[i][0]===1||sArray[i][0]===0){
            rect(-width/2+i%n*s+width/20,-height/3+j%n*s,s,s);
            image(img,-width/2+i%n*s+width/20,-height/3+j%n*s,s,s);
          }
          //case2
          if(sArray[i][0]===1||sArray[i][0]===0){
            rect(width/12+i%n*s,-height/3+j%n*s,s,s);
            image(img,width/12+i%n*s,-height/3+j%n*s,s,s);
            push()
            scale(-1,1)
            rect(-(width/12-i%n*s+(n+1)*s),-height/3+j%n*s,s,s);
            image(img,-(width/12-i%n*s+(n+1)*s),-height/3+j%n*s,s,s);
            pop()
            
          }          
          //case3
          if(sArray[i][0]===1||sArray[i][0]===0){
            rect(-width/2+width/20+i%n*s,height/20+j%n*s,s,s);
            image(img,-width/2+width/20+i%n*s,height/20+j%n*s,s,s);
            push()
            scale(-1,1)
            rect((width/2-width/20+i%n*s-(n+1)*s),height/20+j%n*s,s,s);
            image(img,(width/2-width/20+i%n*s-(n+1)*s),height/20+j%n*s,s,s);
            pop()
          }   
        push()
        translate(0,-height/20+(n+5.25)*s);
        scale(1,-1)
        if(sArray[i][0]===1||sArray[i][0]===0){
            rect(-width/2+width/20+i%n*s,height/20+j%n*s,s,s);
            image(img,-width/2+width/20+i%n*s,height/20+j%n*s,s,s);
            push()
            scale(-1,1)
            rect((width/2-width/20+i%n*s-(n+1)*s),height/20+j%n*s,s,s);
            image(img,(width/2-width/20+i%n*s-(n+1)*s),height/20+j%n*s,s,s);
            pop()
          }  
        pop()
          
      }
  }
}
!
999px

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