def Sunflower():
	field = field_plant_grid(get_world_size(), 0)
	
	for cell in field:
		goto(cell)
		better_plant(Entities.Sunflower)
		field[cell] = measure()

	m = 15
	while field:
		delete = []
		for cell in field:
			if field[cell] == m:
				goto(cell)
				harvest()
				delete.append(cell)
		for d in delete:
			field.pop(d)
		m -= 1
	
while num_items(Items.Power) < 10000:
	Sunflower()