Simulation

 For the solid, liquid gas part, when you add heat to all molecules they start to spread and move fast. When we take away heat, the molecules slow down.  They are all the same because they all do  he same thing. They are different colors. At room temperature neon is moving kind of fast. At 25K the molecules start to connect and slow down.
 For the phase change, the higher the pressure the faster the molecules move and spread. When we add pressure the molecules squeeze together to survive. When the pressure is too high the molecules expand and break the top and fly around.