I overdid things a little when trying to teach 6th graders how to draw a star using Python Turtle. But I thought that it was fun anyways so I'm sharing it here.

Note that this is also my first dev.to article. I appreciate any suggestion.

# Start with a zig zag

A zig-zag can be simple to explain. We just have to move the cursor left then right over and over

```
import turtle as t
angle=150
side=100
angle_left=angle
angle_right=angle
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
```

Here's what we get

As we have repeating code we want to use a loop to reduce the code

```
import turtle as t
angle=150
side=100
pointies = 10
angle_left=angle
angle_right=angle
for p in range(pointies):
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
```

Above we can change the value of `pointies = 10`

to change the number of zig zags

# Rotate the zig zag

What happens if we rotate the zig zag by a certain value

```
import turtle as t
angle=150
side=100
pointies = 10
ROTATION = 30
angle_left=angle
angle_right=angle
for p in range(pointies):
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
t.right(ROTATION)
```

All we did above was added this statement `t.right(ROTATION)`

. We also said `ROTATION = 30`

and here's what we get

But wouldn't it be nice if the ends were connected? To achieve this we just need to set rotation to `ROTATION = 360/pointies`

. Remember that 360 degrees is a full rotation.

```
import turtle as t
angle=150
side=100
pointies = 10
ROTATION = 360/pointies
angle_left=angle
angle_right=angle
for p in range(pointies):
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
t.right(ROTATION)
```

The result:

# Color the star

To color the star we first set the color using `t.color("red","red")`

. We then use the `begin_fill`

and `end_fill`

commands to start and stop filling the area. Here's it is:

```
import turtle as t
t.speed(0)
angle=150
side=100
pointies = 10
ROTATION = 360/pointies
angle_left=angle
angle_right=angle
t.color("black","red")
t.begin_fill()
for p in range(pointies):
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
t.right(ROTATION)
t.end_fill()
```

In the code above we have also added a statement `t.speed(0)`

to speed things up

We can now draw stars with any number of points of any color. Here are some examples:

# Rotate the star

Why stop at drawing a star when we can rotate it! To do this we use a nested for-loop. This means a loop inside a loop

```
import turtle as t
t.speed(0)
angle=150
side=100
pointies = 5
ROTATION = 360/pointies
angle_left=angle
angle_right=angle
t.color("red","black")
for r in range(10):
t.begin_fill()
for p in range(pointies):
t.forward(side)
t.right(angle_right)
t.forward(side)
t.left(angle_left)
t.right(ROTATION)
t.end_fill()
t.right(2)
```

In the code above we added an extra loop that runs 10 times - `for r in range(10):`

. We have also added a `t.right(2)`

to the end of the loop to make the turtle rotate slightly everytime the inner loop completes

Check it out:

## Discussion (0)