//declaring those oh-so-many variables
int randX, randY, randCol1, randCol2, randCol3, randSize1, randSize2;

void setup()
{
  //the field is 400 by 400
  size(400,400);
}


void draw()
{
  //when any key is pressed...
  if(keyPressed == true)
  {
    //...randomly placed...
    randX = int(random(0, 400));
    randY = int(random(0, 400));
    //...randomly sized...
    randSize1 = int(random(3, 250));
    randSize2 = int(random(3, 250));
    //...randomly colored...
    randCol1 = int(random(0, 255));
    randCol2 = int(random(0, 255));
    randCol3 = int(random(0, 255));
    //...squares with no outlines are created.
    noStroke();
    fill(randCol1, randCol2, randCol3);
    rect(randX, randY, randSize1, randSize2);
  }
}