Expected indented block for property after ":"

[gertkeno]

I think you want the raycast to get the tilemaplayer by collision

if is_colliding():
    var collider := get_collider()
    if collider is TileMapLayer:
        var collision_point := get_collision_point()
        # need to do some coversion that I am not familiar with.
        collider.set_cell(collision_point, 0, _land)