Hi Aggiemom,
Which walkthrough are you looking at? The GB one by Philip Reynolds? He says:
From the start step onto the purple block go right three steps to a blue, forward once to an orange then left twice to a purple. Go left then forward two to an orange, then go right then left to a purple. Continue right three to another purple then right to a blue and forward to an orange then finally right to the final arrow.
How far do you get before it messes up?