/*project-0 reproduce Michael Noll's computer art:
Ninety Parallel Sinusoids With Linearly Increasing Perio*/
float yoffset=40;
float amplitude=30;  //the 1/2 of y peak-to-peak difference
float period=30/PI;  //the initional x wavelength
float shift=PI;      //the amount that shift to left
 
void setup(){
  size(590,590);
  background(255);
  smooth();
  noFill();
  noLoop();
}
 
void draw(){
  stroke(0);
  for(int i=0;i<90;i++){   //reproduce the curve 90 times with different yposition
    beginShape();
       for(int x=0;x<=width;x++){
       float y = amplitude*sin(x/period+shift)+yoffset; // y=asin(bx+c)+d
       vertex(x,y);         //draw cruve
       period+=PI/100;      //linearly increase the period
     }
    endShape();
    period=30/PI;  //reset the period
    yoffset+=5.8;  //shift the yposition down
  }
}