create a code which is a memory game in which the cards are figures of the ASCII code, you can move between cards with the arrow keys

void setup() {
  size(500, 500);
  background(255);
  textSize(30);
  fill(0);
}

void draw() {
  background(255);
  text(key, width/2, height/2);
  if (keyCode == LEFT) {
    text(key-1, width/2, height/2);
  }
  if (keyCode == RIGHT) {
    text(key+1, width/2, height/2);
  }
}