what exactly do you mean?

//For the #wccChallenge on the theme of 'lines only'. 

//Only horizontal lines.

​

let lineHeight, simplex

let colors=["#8e5017","#d29c34","#a40e02","#28727f","#3b515d","#0f120c"]

let time

​

function setup() {

  let m=min(windowWidth, windowHeight)

  createCanvas(m, m);

  simplex= new openSimplexNoise(Date.now())

  lineHeight=height*0.005

  background(0);

  stroke(255)

  strokeCap(SQUARE)

  strokeWeight(lineHeight)

}

​

function draw(){

  time=frameCount/200

  background(10, 10);

  let offAmount= width*0.5

  let offer=0

  for(let y=0; y<=height+lineHeight; y+=lineHeight){

    let mainX= width*0.5// + simplex.noise3D(y/200, time, 1)*offAmount

    let mainW= map(simplex.noise2D(y/100+(time*3), time), -1, 1, width*0.05, width*0.5)

    let half= mainW*0.5

    let leftover= (width-mainW)*0.5

    let secondaryW=map(simplex.noise3D(y/100+(time*3), time, 3), -1, 1, 0, leftover)

    let left=mainX-half

    let right= mainX+half

    let tertiaryW=leftover-secondaryW

    if(offer%2==1){

    stroke(colorMixer(mainX, y, colors))

    line(mainX-half, y, mainX+half, y)

    stroke(colorMixer(tertiaryW*0.5, y, colors))

    line(0, y, tertiaryW, y)

    stroke(colorMixer(width-tertiaryW*0.5, y, colors))

    line(width, y, width-tertiaryW, y)

    } else

      {

        let leftX= left*0.5

        stroke(colorMixer(leftX, y, colors))

        line(left-secondaryW, y, left, y)

        let rightX= right*0.5

        stroke(colorMixer(rightX, y, colors))

        line(right, y, right+secondaryW, y)

      }

    offer++

  }

}

​

​

function colorMixer(x, y, colorArray) {

  let c = noise(x/100+time, y/150+time, time*0.25) * colorArray.length

  let c1 = floor(c)

  let c2 = floor(c + 1) % colorArray.length

  let color1 = colorArray[c1]

  let color2 = colorArray[c2]

  let mix = fract(c)

  let coloring = color(spectral.mix(color1, color2, mix))

  return coloring

}

​