How do I split the viedo screen into three segments?

Hello! I,m totally new using Linux and Kdelive, so I aprecciate any help :)
How do I split my video screen into three segments of the same size? The idea is to create a effect like the one used in the video Always by Blink 182. Someone told me to use the "composite" effect but that didn't divide the screen how I wanted it.

Thanks!