Translation:Ik ben aan het lopen.
I think I just had an epiphany. Not sure. Is the dutch "aan het" a sort of translation to the English "currently"
That's pretty much it! Here is some more explanation if you need it: https://www.duolingo.com/comment/4298404
But i also could have said " ik loop" and it would mean exactly the same?
"ik loop" was accepted in my exercise. but "ik gaa" wasn't.
Both 'ik wandel' and 'ik loop' mean 'I walk', but 'ik ga' means 'I go', which is why it wasn't accepted. ;)