if (i >= 0) {

    return i % nodes.length;

  } else if (i < 0) {

    return nodes.length + i

  }

}

​

function midpoint(v1, v2) {

  return (createVector((v1.x + v2.x) / 2, (v1.y + v2.y) / 2));

}

​

function distSq(v1, v2) {

  return (v2.x - v1.x) ** 2 + (v2.y - v1.y) ** 2;

}

​

function lerpColorFive(c1, c2, c3, c4, c5, i)

{

  if(i <= 0.25)       {return lerpColor(c1,c2, map(i,0,0.25,0,1));}

  else if(i <= 0.5)   {return lerpColor(c2,c3, map(i,0.25,0.5,0,1));}

  else if(i <= 0.75)  {return lerpColor(c3,c4, map(i,0.5,0.75,0,1));}

  else                {return lerpColor(c4,c5, map(i,0.75,1,0,1));}

}