I used a random mix of red, white, and three shades of pink 1x2 bricks. I didn't have a lot of this color so I put a layer of transparent 1x2 plates between the layers to make it stronger.
Now pull the two strips towards you so that they will meet again at a point on the bottom. The 90 degree angle is the point where the two top arches of a heart meet and pulling the strips towards you creates these arches.
Want more 1x2 LEGO fun? Check out these other 1x2 bendy shape Instructables:
Lego Saw Blade
Lego Deltoid and Astroid
Lego Medical Sign