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    Lab 12
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# Lab 12, Part 2: Gentle Starter Problem

## Checking the Turtle's ink supply (recursion and counting)

Imagine your Turtle had a limited supply of ink, and it should keep drawing a given pattern *until* it runs out of ink.

For example, let's say we want to draw a stair pattern and we want to draw `x` “stairs” before the “ink runs our ”


```py
def drawStairs(w, ink):

   dashes = 0

   # Calculate ink used to draw rectangle
   inkNeeded = 2*h + 2*w

   # Do not have enough ink to draw another one
   if ink < inkNeeded:
        return dashes
   else:
        # Draw single stair
        fd(w)
        pu()
        fd(w * .1)
        pd()

        # Count the 1 drawn rect and recurse to draw the rest of rects
        dashes = 1 + drawDashes(w, h, ink - inkNeeded)

        # How many rectangles were drawn
        return dashes
```

## Write the output of these invocations of `test`:
1. ### `drawDashes(25, 30, 100)`
&nbsp;
&nbsp;

2. ### `drawDashes(25, 15, 100)`
&nbsp;
&nbsp;

3. ###`drawDashes(5, 10, 100)`

## View the `test` invocation solutions

<p>Type password (given in lab) to see the solution.</p>


<input type="text" onkeyup="updateLink(this);">
<img src='test_diagram.png' id='solution' style='display:none;'>

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