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CSS

              
                
              
            
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JS

              
                const frame = new Frame("fit", 1024, 768, yellow, grey);
frame.on("ready", ()=>{ // ES6 Arrow Function - similar to function(){}
	zog("ready from ZIM Frame"); // logs in console (F12 - choose console)

	// often need below - so consider it part of the template
	const stage = frame.stage;
	const stageW = frame.width;
	const stageH = frame.height;

	// REFERENCES for ZIM at https://zimjs.com
	// see https://zimjs.com/intro.html for an intro example
	// see https://zimjs.com/learn.html for video and code tutorials
	// see https://zimjs.com/docs.html for documentation
	// see https://codepen.io/topic/zim/ for ZIM on CodePen
	
	// *** NOTE: ZIM Cat defaults to time in seconds
	// All previous versions, examples, videos, etc. have time in milliseconds
	// This can be set back with TIME = "milliseconds" but we suggest you give it a try!
	// There will be a warning in the conslole if your animation is not moving ;-)

	// CODE HERE
	
	new Label("R E P E T I T I O N", 60, "impact", yellow.darken(.3)).pos(0,50, CENTER);
	
	// we will get a new color in this order 
	const colors = series(blue,pink,orange,yellow,red,light,green);
	
	// making two tiles that are almost the same so use STYLE
	STYLE = {
		cols:7, 
		rows:4, 
		colSize:130,
		rowSize:130,
		align:CENTER,
		valign:CENTER
	}

	// make the backing clickable 
	// just a little easier for the user than the shape when the shape changes
	const back = new Tile(new Rectangle(125, 125, purple, grey)).center().cur();	
	const tile = new Tile(new Circle(50, green)).center().noMouse();
	
	// turn off the STYLE - or use Style.clear()
	STYLE = {};
	
	// this will hold our data for each change that we want 
	// in the format of [tile index going backwards and the forwards] then shape index and color
	// we store one of these each time we click on a tile
	// [ [[4,6],1,color], [] ]
	const tasks = [];
	
	// set up an auto activate so it animates to start - good for CodePen people to see some motion 
	// choose a random tile number in the middle to start
	const r = rand(9, tile.items.length-9);
	let auto = interval(1, ()=>{
		activate(r);
	}, 3, true); // three times immediately
	
	// also call activate when press down on a tile
	// do not want to continue auto activating when users clicks so clear the auto interval
	back.on("mousedown", e=>{		
		activate(e.target.tileNum);		
		if (auto) {
			auto.clear();
			auto = null;
		}
	});
		
	function activate(tileIndex) {
		
		// pick the next color from the series 
		// get the tile at the index 
		// and swap for a new random shape		
		let color = colors();				
		let current = tile.items[tileIndex];
		let shapeIndex = rand(shapes.length-1);		
		swapShape(tileIndex, shapeIndex, color);
		stage.update();	
		
		// add the task to the tasks
		tasks.push( [[tileIndex-1, tileIndex+1], shapeIndex, color] );
	}	
	
	// use an interval to handle all updates
	// we will use a Slider to change the speed of the interval 
	// so store it in a variable and call a named function 
	// this allows us to clear the interval and call it again with a new speed 
	// we could use ZIM VEE to dynamically change the speed of the interval 
	// but that always waits for the current interval to finish 
	// before moving to the new interval speed - so can see sluggish
	// So... we will clear the interval and remake it in the slider event function later
	let inter = interval(.2, change);
	
	function change() {
		// loop through each task
		// each time reducing or increasing the back and fore values
		// and setting the appropriate shapes 
		loop(tasks, (task, i)=>{
			let back = task[0][0]--;
			let fore = task[0][1]++;
			if (back >= 0) {
				swapShape(back, task[1], task[2]);
			} 
			if (fore < tile.items.length) {
				swapShape(fore, task[1], task[2]);
			} 
			// remove the task when all done
			if (back < 0 && fore >= tile.items.length) tasks.splice(i,1);						
		}, true); // loop backwards when potentially removing
		
		stage.update();
	}
	
	// the shapes to randomly pick from
	// centerReg the Rectangle so they place on others which are already centerReg
	const shapes = [
		new Circle(50),
		new Rectangle(100,100).centerReg({add:false}),
		new Triangle(100,100,100),
		new Poly(60,[5,6,7,8],{min:.4, max:.6}),
		new Poly(60,[5,6,7,8],{min:.4, max:.6})
	];	
	
	function swapShape(tileIndex, shapeIndex, color) {
		// clone the shape - using true to make sure Poly is exact per task
		let shape = shapes[shapeIndex].clone(true); 
		shape.color = color;
		// record the shape we are replacing
		let replace = tile.items[tileIndex];
		// loc will place at the same location
		// need to add it to the tile
		shape.loc(replace, null, tile);
		// remove the old shape
		replace.removeFrom().dispose();
		// set the tile item
		tile.items[tileIndex] = shape;
		// and set the tileNum on the shape (used in activate)
		shape.tileNum = tileIndex;
	}
	
	// create the slider
	STYLE = {
		backgroundColor:purple,
		rollBackgroundColor:pink,
		borderColor:dark
	}	
	new Slider({
		min:.5,
		max:0,
		step:.05,
		useTicks:true,
		semiTicks:false,
		button:"aztec",
		currentValue:.2
	}).pos(70, 40, CENTER, BOTTOM).change(e=>{
		// clear the old interval
		inter.clear();
		// remake the interval with the slider speed
		inter = interval(e.target.currentValue, change);
	});	
	
	stage.update(); // this is needed to show any changes

	// DOCS FOR ITEMS USED
	// https://zimjs.com/docs.html?item=Frame
	// https://zimjs.com/docs.html?item=Circle
	// https://zimjs.com/docs.html?item=Rectangle
	// https://zimjs.com/docs.html?item=Triangle
	// https://zimjs.com/docs.html?item=Poly
	// https://zimjs.com/docs.html?item=Label
	// https://zimjs.com/docs.html?item=Slider
	// https://zimjs.com/docs.html?item=change
	// https://zimjs.com/docs.html?item=noMouse
	// https://zimjs.com/docs.html?item=loop
	// https://zimjs.com/docs.html?item=cur
	// https://zimjs.com/docs.html?item=pos
	// https://zimjs.com/docs.html?item=loc
	// https://zimjs.com/docs.html?item=removeFrom
	// https://zimjs.com/docs.html?item=centerReg
	// https://zimjs.com/docs.html?item=center
	// https://zimjs.com/docs.html?item=Tile
	// https://zimjs.com/docs.html?item=rand
	// https://zimjs.com/docs.html?item=interval
	// https://zimjs.com/docs.html?item=series
	// https://zimjs.com/docs.html?item=darken
	// https://zimjs.com/docs.html?item=zog
	// https://zimjs.com/docs.html?item=STYLE

	// FOOTER
	// call remote script to make ZIM icon - you will not need this
	createIcon(); 
	createGreet();

}); // end of ready
              
            
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