let snakeShader

​

function setup() {

  createCanvas(400, 400, WEBGL);

  snakeShader = baseMaterialShader().modify({

    vertexDeclarations: 'in float len;'

  })

  const pts = []

  for (let i = 0; i < 50; i++) {

      pts.push(createVector(random(width), random(height)))

  }

 snake = buildGeometry(() => {

    noFill()

    beginShape()

    for (const [i, { x, y }] of pts.entries()) {

        vertexProperty('len', [i/(pts.length-1)])

        splineVertex(x, y)

    }

    endShape()

  })

}

​

function draw() {

  clear()

  strokeShader(snakeShader)

  model(snake)

}