Term 2, Week 2 - Science Lab Scene renders

This week I've been working on my Science Lab scene, I had some troubles last week with the layered shader, but once I got that sorted out it got a lot easier with working out how to layer files onto shaders for the objects in my scene.
I changed the lighting in my scene so that there are two different versions.
The first version is when all the action is happening outside, there are sirens outside the window going past.
The second version is like aftermath and is showing a different time of day, in this case the sun is setting. It looks a lot calmer than the first image.