head_position = self.get_head_position() self.draw_rect(head_position, self.body_color) x_move, y_move = head_position[0], head_position[1] if x_move >= SCREEN_WIDTH and y_move >= SCREEN_HEIGHT: x_move, y_move = - GRID_SIZE, - GRID_SIZE elif x_move < 0 and y_move < 0: x_move, y_move = SCREEN_WIDTH, SCREEN_HEIGHT if self.direction == RIGHT: self.positions.insert(0, (x_move + GRID_SIZE, y_move)) elif self.direction == LEFT: self.positions.insert(0, (x_move - GRID_SIZE, y_move)) elif self.direction == UP: self.positions.insert(0, (x_move, y_move - GRID_SIZE)) elif self.direction == DOWN: self.positions.insert(0, (x_move, y_move + GRID_SIZE)) self.last = self.positions.pop()

This code snippet appears to be part of a snake game implementation. It seems to be responsible for updating the position of the snake's head based on the current direction of movement.

Here's a breakdown of the code:

1. Get the current head position of the snake.
2. Draw a rectangle representing the snake's body at the head position with a specified color.
3. Update the x and y coordinates of the head position based on the current direction of movement.
4. Check if the head position goes beyond the screen boundaries and adjust it accordingly to create a wrap-around effect.
5. Depending on the direction of movement (RIGHT, LEFT, UP, DOWN), insert a new position at the front of the snake's positions list and remove the last position to simulate movement.

Overall, this code snippet handles the logic for updating the snake's position based on the current direction of movement in a grid-based environment.