Processing (2º trabalho)

void setup() { size(500, 500); background(0); noFill(); smooth();}
void draw() { if(mouseButton == LEFT) { pushMatrix(); translate(100, 100); stroke(mouseX, mouseY, 0); line(pmouseY, 250, 250, mouseX); popMatrix(); line(pmouseY, pmouseY, 50, pmouseX); } else if(mouseX>1 &&(mouseY>0)) { pushMatrix(); translate(100, 100); popMatrix(); stroke(255); line(pmouseY, pmouseY, 250, pmouseX); } else { background(0); }}