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// Have this add two waves together
var offset = 0;
function setup() {
createCanvas(360, 400);
}
function draw() {
background(220);
stroke(0);
fill(0);
beginShape();
vertex(0,height);
for (var x = 0; x < width; x++) {
//var angle = map(x,0,width,0,TWO_PI);
angle = offset + x * 0.01;
var y = map(sin(angle), -1, 1, 150, 250);
vertex(x, y);
}
vertex(width,height);
endShape();
offset += 0.1;
}