6 by 6 grid puzzle trick -- I CANT DO IT!

My brother just told me he couldnt work this trick /game out and i was like i will give it a go, and now i cant do it, its driving me crazy!!

ok what you do, get some paper.

Draw down a 6 by 6 grid with dots… ( 6 rows and 6 columns)

– You can only start from one of the corners (top left, top right, bottom left, bottom right)

You have to pass over each dot in the grid and must end on the oposite corner that you started (start, top left , end bottom right)

You can only go sideways, up and down and you cannot pass through the same way twice (up then up again or side and side again… ect…)

HOW DO YOU DO IT!!! :crazy: