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var theta = 0;
var amp = 60;
xPos = 0;
function setup() {
createCanvas(600, 300);
fill(255);
noStroke();
//background(244, 132, 140);
}
function draw() {
background(244, 132, 140);
theta += 0.02;
var diam = 100 + sin(theta) * amp;
ellipse(width/2, height/2, diam);
}