B.bro 1.1 - light seeking upgrade

I got a little sick of working on my string based drawbot, so I decided to go back to the bot that started it all for me.  This is B.bro - named for the White Stripes song "Baby Brother".  In the last two days I've added analog light sensors to him, and written light seeking software to work with them.  I'm pretty pleased.  There's video of him running on YouTube.