size(500,500);
background(255,255,255);


for(int i=1;i<=width;i++){
  int a = i * 70;
  int b = i * 100;
  int c = i * 1;
  int d = i * 5;
  int e = i * 1;
  int f = i * 100;
  int g = i * 200;
  int h = i * 1;
  
  // random line color
  float c1 = random(0,255);
  float c2 = random(0,255);
  float c3 = random(0,255);
  
  stroke(c1,c2,c3);
  curve(a,b,c,d,e,f,g,h);
}