Turtle Blocks V87

Turtle Blocks (previously called Turtle Art) V87 is released.

It can now do filled polygons

and has a 3 axis colour model, the 3 axes are color, shade and gray and range 0-100

Shown below, the color is represented by the angle, the shade by the radius and the successive figures (L-R) are gray = 0, 25, 50, 75, 100

The strongest colours are for shade =50 and gray = 100