Everyone with half a brain knows space behind the light and mass is made of nothing, nothing can not ripple or wave.

I don't see it that way, but I am not missing 50% of my brain, either. Light is made of electromagnetic energy, specifically, an electric component, and a magnetic component.

I would tend to argue that according to the Principle of Mass/Energy Equivalence, everything is made of energy, including mass. My favorite way to state that principle is, "Energy is unbound mass that travels through space, mass is bound energy that occupies a location in space."

You mentioned light specifically, so think about a massless photon. I'm going to oversimplify here to try to be clear. Everything moves in a 3 dimensional space described by three axes, x, y and z. In the case of a photon, you have a wave in the x plane (electric component) and a wave in the y plane (magnetic component) traveling through space together at speed c. Like this:

http://ffden-2.phys.uaf.edu/webproj/212_spring_2014/Amanda_Mcpherson/Amanda_McPherson/em_electric_magnetic_propagating_waves.jpgWhat is not possible is to include a third wave along the z plane simultaneously. Simultaneous forward motion along all three axes cannot occur. The z axis in that image I linked to is perpendicular to both the other axes, so any "forward" motion along that axis would take a particle AWAY from the other two axes. Consequently, what was forward motion for the wave along the x and y axes becomes an oscillation back and forth about the z axis. Energy is conserved, so the momentum that was previously dedicated to forward motion through space becomes an oscillation at a location designated by where the z axis intersected the x and y axes.

This is what is meant by the phrase I got from a quote on a Tool album, "Matter is merely energy condensed to a slow vibration." Forward motion at speed c along the x and y axes becomes an oscillation at a location in space designated by their intersection with a z axis. I like to think of this as a "particle in a box" model. The "box" is the space around the intersection of all three axes about which the waves oscillate. Light has no mass because it is not "in a box." It only has two dimensions, x and y. When it becomes binding energy by being absorbed by an atom at location x,y,z, THEN it is in a box, and contributes a bit of mass to the system.

The more I learn about this stuff, the more my opinions change from those previously held. These days, I am starting to think that everything is actually made of spacetime, including energy. Energy is merely a ripple in spacetime. When you confine those ripples to a location with 3 coordinates, that spacetime gets "tangled up" into a particle. That "snag" pulls a little bit on the surrounding spacetime fabric, which is gravity. That's what gives things "mass." The more particles in a mass, the more "tangling" to pull on the fabric of spacetime, which warps it.

Two black holes colliding is like two giant "snarls" in the fabric of spacetime becoming instantly interwoven, which gives the entire fabric a nice tug momentarily.