function setup() { createCanvas(300, 300, WEBGL); //fill(237, 34, 93); noFill(); } function draw() { background(220); beginShape(); let nn = 15; //vertex(0,0); for(let i=0;i<nn;i++){ let r = i / (nn-1) * 2 * PI; let amp = 120; if( i%2==0 ) amp = 50; let t = frameCount*0.01; vertex(amp*cos(r+t), amp*sin(r+t)); //let size = i*2;//%2==0 ? 20 : 5; //circle(amp*cos(r+t), amp*sin(r+t), size); } endShape(); }