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HTML

              
                <script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.8/p5.js"></script>     

              
            
!

CSS

              
                body {margin:0px; padding:0px; overflow: hidden}
              
            
!

JS

              
                let prevInitFrame = 1;
let radius = 100;
let plotData = [];

function setup() {
    createCanvas(windowWidth, windowHeight);
}

function draw() {
  clear();
  background(224, 239, 243);

  // Calculate sine and cosine of current angle (frameCount)
  let rad = radians(frameCount - 1) * 2;
  let sine = sin(rad);
  let cosine = cos(rad);

  // Get x and y coordinates from sine and cosine
  let x = cosine * radius;
  let y = -sine * radius;

  // Draw unit circle and related lines/points
  push();
  translate(radius + 20, height / 2);
  fill(255); 
  strokeWeight(1);
  ellipse(0, 0, radius * 2, radius * 2); // Unit circle
  line(-radius, 0, radius, 0); // Horizontal line through center of circle
  line(radius + 20, y, -radius - 20, y); // Horizontal line at Y position of current angle
  strokeWeight(3);
  line(0, 0, x, y); // Line from center to point on circle
  line(x, 0, x, y); // Vertical line from point on circle to x-axis
  line(0, 0, x, 0); // Horizontal line from center to point on circle's x-coordinate
  strokeWeight(1);
  drawCircleMarker(createVector(x, y), 4); // Draw point on circle
  pop();

  // Setup and update the sine wave graph data
  let graphW = width - (radius + 20) * 2;
  let graphX = (radius + 20) * 2;
  if (frameCount > prevInitFrame + graphW) {
    plotData = [];
    prevInitFrame += graphW;
  }
  plotData.push({x:frameCount - prevInitFrame, y: -y});

  // Plot the sine wave graph
  plotGraph(plotData, graphX, height / 2, graphW, height - 64, 0, graphW, -height / 2 + 32, height / 2 - 32, "time", "y");
}


function plotGraph(data, ox, oy, w, h, minX, maxX, minY, maxY, xLabel, yLabel) {
    let left = ox - minX / (maxX - minX) * w;
    let top = oy - maxY / (maxY - minY) * h;
    let labelLeft = abs(left - ox) > abs(left + w - ox);
    let labelTop = abs(top - oy) > abs(top + h - oy);

    push();

    noFill(); stroke(0);
    line(left, oy, left + w, oy); // X-axis
    line(ox, top, ox, top + h);  // Y-axis

    // Plot the data
    beginShape();
    for (let i = 0; i < data.length; i++) {
        let x = ox + data[i].x / (maxX - minX) * w;
        let y = oy - data[i].y / (maxY - minY) * h;
        vertex(x, y);
    }
    endShape();

    fill(0);
    drawLabel(labelLeft ? left : left + w, oy + (labelTop ? 16 : -8), xLabel, labelLeft ? LEFT : RIGHT);
    drawLabel(ox, labelTop ? top : top + h, yLabel, labelLeft ? RIGHT : LEFT);

    pop();
}

function drawLabel(x, y, label, align = CENTER) {
  push();
  strokeWeight(0);
  textFont("monospace");
  textSize(14);
  textAlign(align);
  if (align == LEFT) {x += 6;}
  if (align == RIGHT) {x -= 6;}
  text(label, x, y);
  pop();
}

function drawCircleMarker(p, size) {
  ellipse(p.x, p.y, size * 2, size * 2);
}
              
            
!
999px

Console