Create fluid_mov.js

Random Particle Movement

Description

Simulation showing random movement of particles.

Related Issue

N/A

https://github.com/ThePhysHub/ThePhysicsHub/issues/52

Motivation and Context

Statistics/study of fluids etc

How Has This Been Tested?

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.