The Logo language made the concept of turtle graphics famous. In this assignment, you build your website to simulate the Logo language using Javascript.

Imagine a mechanical turtle that walks around the room under the user's control. The turtle holds a pen in one of two positions, up or down. While the pen is down, the turtle traces out shapes as it moves; while the pen is up, the turtle moves about freely without writing anything.

Create a 50-by-50 floor that is initialized to empty. You may reduce the size of the floor, but the smallest one is 20-by-20. Assume that the turtle always starts at position 0, 0 of the floor with its pen up, facing right.

The web user controls the turtle interactively. You may decide the way of controlling this turtle, including the four directions of turtle movement, Up, Down, Left, Right, set pen Up/Down, and Reset the floor. You may use buttons, keys, or other ways to control the turtle.