Particles and Meshes. Simple example

Code Sharing
1

Just touch the screen.

--# Main
-- Particles
particle = {}
nParticles = 2000
gemScale = .2
function setup()
    gemMesh = mesh()
    gemMesh.texture = "Planet Cute:Gem Blue"
    w,h = spriteSize(gemMesh.texture)
    w = w * gemScale
    h = h * gemScale
    for i=1, nParticles do 
        particle[i] = Particle() 
    end
end

function draw()
    background(40, 40, 50)
    strokeWidth(2)
    for i=1, nParticles do
        particle[i]:draw(i)
    end
    gemMesh:draw()
end

function touched(touch)
    if touch.state == BEGAN or touch.state == MOVING then 
        touching = true
        fingerPos = vec2(touch.x,touch.y)
    else
        touching = false
    end
end    
--# Particle
Particle = class()

function Particle:init()
    self.pos = vec2(math.random(WIDTH), math.random(HEIGHT))
    self.vel = vec2(0,0)
    gemMesh:addRect(0,0,0,0)
end

function Particle:draw(i)
    if touching then
        d = self.pos:dist(fingerPos)    
        if d < 200 then
            self.vel = self.vel + (self.pos-fingerPos):normalize():rotate(math.pi+1) * (200-d) * .003
        end
    end
    self.vel = self.vel * .98
    self.pos = self.pos + self.vel
    if self.pos.x >= WIDTH or self.pos.x <= 0 then self.vel.x = -self.vel.x end
    if self.pos.y >= HEIGHT or self.pos.y <= 0 then self.vel.y = -self.vel.y end
    gemMesh:setRect(i,self.pos.x,self.pos.y,w,h)
end
2

Cool!