Prototype in the making

This morning, we are building a prototype using post-its and Little bits. Right now we're having two different scenarios which we want to try out.

First out is a simple on/off-scenario where the user is standing on one box and a we turn on a light on the other box. Will the user walk to och from the light? Second is a colortest. We apply a red filter to one of the lights and try to find out if the user choose to stand on the red light or not. Do the red color make it more obvious that user should move? This afternoon we will try out the prototype and do thinkalouds.

Instructions for the thinkalouds.
Give the user context, "imagine going onto the tvärbana".
First scenario. We ask the user to stand on one of the two boxes, both lights are on.
The light on the box the user is standing on is turned off. Are the user changing box? Why?
Second scenario. We ask the user to stand on one of the two boxes, no lights are on.
The light on the box the user is standing on turns red. Are the user chaining box? Why?