Multiple pulse sensor


I started a few days ago with a project that use pulse sensor ( My idea is to use two pulse sensor on one Arduino board. I am totally inexperienced and for me it is very difficult to make changes on a complex code such as that provided by I've tried to make small changes but they didn't work!! :( I use this arduino code , and I would like to change it for my purpose. There is anyone who can help me? Please can you share the right way to run two pulse sensor for blinking two different led?