input: Write a function to move the player image using arrow keys.
  assert move_player([100,100], "UP") == [100, 95]
  assert move_player([100,100], "DOWN") == [100, 105]
  assert move_player([100,100], "LEFT") == [95, 100]
  assert move_player([100,100], "RIGHT") == [105, 100]
output: def move_player(position, direction):
      if direction == "UP":
          position[1] -= 5
      elif direction == "DOWN":
          position[1] += 5
      elif direction == "LEFT":
          position[0] -= 5
      elif direction == "RIGHT":
          position[0] += 5
      return position