pr8.spl

List results = []
Integer counter = 0
Integer listLength = mylist1.length()

Integer checkSum = 0
Integer a = 0
Integer b = 0

Integer afterFive = 0

while (counter < listLength){

	a = mylist1.pop()
	b = mylist2.pop()

	results.push(a)
	results.push(b)

	checkSum = checkSum + a - b

	afterFive = afterFive + 1
	
	if (afterFive == 5){
		afterFive = 0
		results.push(checkSum)
		checkSum = 0	

	}
	
	
	counter = counter + 1
}

results.reverse()