Phase 1

### Creating a new worker turtle
1. Right click src/normaljobs.relogo
2. Select New> Turtle
3. Title "Worker"
4. Define new method
```groovy
def step(){}
```

### Preparing UserObserver
1. Open src/normaljobs.relogo/UserObserver
2. Remove comments around `step` and `go` methods
3. Rename createTurtles to createWorkers
4. Replace constant number with variable `numWorkers`
5. Rename target of go method to `workers`
6. Delete body of `ask` closure

### Create `numWorkers` Variable
1. Add new slider to change the number of workers
    `addSliderWL ("numWorkers", "Number of Workers", 1 , 1 , 1000 , 11)`