def crossover(parent1, parent2):
child = Unit()
child.x = random.random() * (parent1.x - parent2.x) + parent2.x
child.y = random.random() * (parent1.y - parent2.y) + parent2.y
child.intensity = random.random() * (parent1.intensity -
parent2.intensity) + parent2.intensity
o1 = min(parent1.offset, parent2.offset)
o2 = max(parent1.offset, parent2.offset)
child.offset = random.choice(range(o1, o2 + 1))
r1 = min(parent1.repetitions, parent2.repetitions)
r2 = max(parent1.repetitions, parent2.repetitions)
child.repetitions = random.choice(range(r1, r2 + 1))
return child
