1. have ur paper laid out like this ___ (landscape)
|___|
2. Then fold it in half vertically
3. have ur paper laid out the same way then fold it in half vertically again
4. then unfold the 2nd fold
5. Where the middle would be originally fold one of those corners in the shape of a triangle to the middle of the final paper then do the same with the other corner.
6. Then fold the leftover parts at the bottom up.
post an image link in the comment so i can see what you made.