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19
let off=0;
function setup() {
createCanvas(windowWidth, windowHeight);
colorMode(HSB,360,100,100);
noStroke();
}
function draw() {
background(220);
for(let i=0;i<18;i++){
off++;
let h=off+i*360/18;
h%=360;
fill(h,100,100);
let x=i*width/18;
rect(x,0,width/18,height)
}
}