def METHOD_NAME(self, obj):
    zValues = []
    if obj.StepDown.Value != 0:
        z = obj.StartDepth.Value - obj.StepDown.Value
        stepdown = obj.StepDown.Value
        if stepdown < 0:
            stepdown = -stepdown
        while z > obj.FinalDepth.Value:
            zValues.append(z)
            z -= stepdown
    zValues.append(obj.FinalDepth.Value)
    return zValues