def setup():
    size(500, 500)
    smooth()
    for i in range(-9, 10):
        for j in range(-9, 10):
            Point(i, j)
            
def draw():
    background(240, 240, 200)
    translate(width / 2, height /2 )
    for p in Point.grid.values():
        p.plot()

class Point():
   
    grid = dict()
    nbr = ((-1, -1), (1, -1), (1, 1), (-1, 1))
    
    def __init__(self, i, j):
        self.i = i
        self.j = j
        self.grid[(i, j)] = self
        self.space = random(49, 51)
        
    def place(self):
        x, y = self.i * self.space, self.j * self.space
        mx, my = mouseX - width / 2, mouseY - height / 2
        a = self.space / sqrt(1 + dist(x, y, mx, my)/100)
        return (self.i * a, self.j * a)
        
    def plot(self):
        stroke(0)
        fill(128, 100)
        beginShape()
        for oi, oj in self.nbr:
            nbr_ij = (self.i + oi, self.j + oj)
            other = self.grid.get(nbr_ij)
            if other:
                 ox, oy = other.place()
                 sx, sy = self.place()
                 mx, my = (ox + sx) / 2., (oy + sy) / 2.
                 vertex(mx, my)
        endShape(CLOSE)
        ellipse(sx, sy, 5, 5)