Tribute Page/CodePen Problem

Ive spent days trying to complete my Tribute page to be similar to the one shown in the example. I could not for the life of me figure out how to include the caption into the thumbnail around the picture. Finally I gave up and looked at the example. I had tried the code that that person used earlier and it didn’t work. I assumed I must’ve made a mistake so I tried it again and it didn’t work. Finally I copied and pasted the entire example code and put it into my Codepen and still it didn’t give me the same exact results. I have bootstrap included…what could be the problem?

Would you mind linking your pen so I could take a look at the code? It would be a great help.