Turtle Spiral Generator

Imagine there's a turtle drawing the line spirally. See the following examples directly.

----
- height = 5
- beginning_length = 100
- decreasing_step = 0.5
- angle = 89
- ending_length = 5
- line_width = 1

----
- height = 5
- beginning_length = 100
- decreasing_step = 0.5
- angle = 73
- ending_length = 5
- line_width = 1
![Turtle Spiral 2](