//Example of iteration using for and while loops.
/*
Just as with conditional ( if / else ) structures, a while loop employs a boolean test condition.
If the test evaluates to true, the instructions enclosed in curly brackets are executed;
if it is false, we continue on to the next line of code. The difference here is that the instructions
inside the while block continue to be executed over and over again until the test condition becomes false.
*/

void setup() {
  size(600,400);
}

//working version using for loop
//void draw() {
//  frameRate(15);
//  for(int x=0; x<width; x+=20) {
//    for (int y=0; y<height; y+=20) {
//      noStroke();
//      fill(random(255),random(255), random(255));
//      rect(x, y, 20, 20);
//    }
//  }
//}


//same as above using while loop
void draw() {
  int x = 0;
  while (x < width) {
    int y = 0;
    while (y < height) {
      noStroke();
      fill(random(255));
      rect(x, y, 10, 10);
      y += 10;
    }
    x += 10;
  }
}