/* keyboard_dots.pde
   Edited by Justin Hsia (orig. Susan Evans)
   
   Draw colored dots on canvas based on key presses.
*/
int position = 0;    // variable to track current position

void setup() {
  size(1000,100);    // wide canvas to show many dots
  noStroke();
  background(0);     // black background
  fill(0);           // start with "invisible" circle initially
}

void draw() {
  // always draw an ellipse at the current position
  ellipse(position, 40, 40, 40);
}

// change fill color to green, yellow, or magenta
// based on which key was pressed
void keyPressed() {
  if(key == 'g') {
    fill(0, 255, 0);    // set fill to green
  }
  if(key == 'y') {
    fill(255, 255, 0);  // set fill to yellow
  }
  if(key == 'm') {
    fill(255, 0, 255);  // set fill to magenta
  }
  
  // always update position, regardless
  // of which key was pressed
  position = position + 50;
}