//SETTING UP VARIABLES USED IN THE SCRIPT
boolean DrawOn;

//------------------------------------

//SETTING UP THE ENVIRONMENT
void setup() {
  size(640,480);
  DrawOn =false;
}

//------------------------------------

/*
// CURRENTLY NEUTRAL

//YOU CAN ONLY HAVE ON VOID LOOP FUNCTION
//NET ON THE SIDE CONCENTATED ON THE MOUSE

void loop()
{

  background(204);

  for(int I=0; I<450; I+=10) {
    line(30, I, mouseX, mouseY);
  }
  for(int S=0; S<450; S+=10) {
    line(610, S, mouseX, mouseY);
  }
}
*/

void loop () {
  if (DrawOn ==true) {
    point (mouseX, mouseY);
    line (pmouseX, pmouseY, mouseX, mouseY);
  }
}

//*****LISTENER PARAMETERS*****

/*
//------------------------------------
//DRAW ON CLICK/RELEASE

//ON MOUSE PRESSED
void mousePressed() {
  DrawOn =true;
}

//ON MOUSE RELEASED
void mouseReleased() {
  DrawOn =false;
}
*/

//------------------------------------
//DRAW ON CLICK. STOP ON CLICK.

//ON MOUSE PRESSED
void mousePressed() {
  if (DrawOn == true) {
    DrawOn = false;
  }
  else {
    DrawOn = true;
  }
}