I have this for a for loop which I made I was wondering how I would write so it would work with a while loop.

def scrollList(myList):
    negativeIndices=[]
    for i in range(0,len(myList)):
        if myList[i]<0:
            negativeIndices.append(i)
    return negativeIndices

So far I have this

def scrollList2(myList):
    negativeIndices=[]
    i= 0
    length= len(myList)
    while i != length:
        if myList[i]<0:
            negativeIndices.append(i)
            i=i+1

    return negativeIndices