How to get a turnkey!

Processing Coding Questions
2

usually the WASD or the UPDOWNLEFTRIGHT keyboard keys are used.
and set a X/Y position.
here a version what show both ( 2 objects // even 2 player )

int p1x,p1y,p2x,p2y;

void setup(){}
void draw(){}

void keyPressed() { //__ we check on KEY operation
  if      (keyCode == UP    )   p1y--;
  else if (key == 'w'       )   p2y--;
  else if (keyCode == DOWN  )   p1y++;
  else if (key == 's'       )   p2y++;
  else if (keyCode == RIGHT )   p1x++;
  else if (key == 'd'       )   p2x++;
  else if (keyCode == LEFT  )   p1x--;
  else if (key == 'a'       )   p2x--;
  println("after move: 1 ", p1x, ",", p1y, "/ 2 ", p2x, ",", p2y);
} // end keyPressed
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