##8.3
```python
def random_color():
r = random(255)
g = random(255)
b = random(255)
return color(r=r, g=g, b=b, a=0.5)
def random_line():
return line(random(-150, 150), random(-150, 150), random(-150, 150), random(-150, 150), stroke=random_color())
for i in range(1000):
show(random_line())
```