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var fr =8;
function setup() {
createCanvas(800, 600);
smooth();
frameRate(fr);
}
function draw() {
background(30,50,100);
translate(0, height/2);
for (var x=80; x <= width-80; x +=15){
noStroke();
strokeWeight(10);
stroke(0, random(150,200), random(200,255));
var h = random(60, 150);
line(x, 0-h, x, 0+h);
}
}