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function setup() {
createCanvas(windowWidth, windowHeight);
background(100);
}
function draw() {
// 255:weißer Hintergrund, 25: Stift verschwindet
background (255,1);
}
function mouseDragged (){
var r = mouseX * 255 / windowWidth;
var g = mouseY *255 / windowHeight;
stroke(r,g,100);
strokeWeight (50);
//=Stiftdicke
line (pmouseX, pmouseY, mouseX, mouseY);
}