diff --git a/js-experiments/3-animation/script.js b/js-experiments/3-animation/script.js
index 49008c6..9da0749 100644
--- a/js-experiments/3-animation/script.js
+++ b/js-experiments/3-animation/script.js
@@ -1,28 +1,28 @@
-var canvas = document.getElementById("canvas");
+let canvas = document.getElementById("canvas");
 canvas.style.background = "#043a4a";
-var ctx = canvas.getContext("2d");
-var phase = 0;
-var speed = 0.00001;
-var frameCount= 0;
-var maxCircleSize = 10;
-var numRows =11;
-var numCols =15;
+let ctx = canvas.getContext("2d");
+let phase = 0;
+let speed = 0.00001;
+let frameCount= 0;
+let maxCircleSize = 10;
+let numRows =11;
+let numCols =15;
 function drawBall(){	
 	ctx.clearRect(0,0,canvas.width,canvas.height);
 	phase = frameCount * speed;
-	for(var i =0; i<2;i++){
-		if(i==0){var strandPhase = phase;}
-		else{var strandPhase = phase +Math.PI};
+	for(let i =0; i<2;i++){
+		if(i==0){let strandPhase = phase;}
+		else{let strandPhase = phase +Math.PI};
 			
-		for(var col=0; col<numCols; col++){
-			var colOffset = (col*Math.PI*2)/numCols;
-			var x = canvas.width-(20*col)-100;	
-			for(var row = 0; row <numRows;row++){
+		for(let col=0; col<numCols; col++){
+			let colOffset = (col*Math.PI*2)/numCols;
+			let x = canvas.width-(20*col)-100;	
+			for(let row = 0; row <numRows;row++){
 				ctx.beginPath();
-				var y = canvas.height/2+row*10+	Math.sin(strandPhase+colOffset)*50;
+				let y = canvas.height/2+row*10+	Math.sin(strandPhase+colOffset)*50;
 				frameCount++;
-				var sizeOffset = (Math.cos(strandPhase-(row/numRows)+colOffset)+1)*0.5;	
-				var circleSize = sizeOffset * maxCircleSize;
+				let sizeOffset = (Math.cos(strandPhase-(row/numRows)+colOffset)+1)*0.5;	
+				let circleSize = sizeOffset * maxCircleSize;
 				ctx.arc(x,y, circleSize, 0, Math.PI*2, false);		
 				ctx.fillStyle = "#f59190";
 				ctx.fill();
@@ -36,4 +36,4 @@ function drawBall(){
 }
 drawBall();
 
-setInterval (drawBall,1);
+setInterval (drawBall,1);
\ No newline at end of file