Convert Piskel frames to pixel-art pattern

piskelToPixelArt.js

  Array.prototype.concat.apply([], Array(pskl.app.piskelController.getFrameCount())).map((_, index) => {
    let palette = {}
    let paletteIndex = 97
    let art = []

    pskl.utils.LayerUtils.mergeFrameAt(pskl.app.piskelController.getLayers(), index).forEachPixel((pixel, col, row) => {
      if (!art[row]) art[row] = []
      if (!pixel) {
        art[row][col] = ' '
        return
      }
      if (!palette[pixel]) {
        palette[pixel] = {
          id: String.fromCharCode(paletteIndex++),
          color: pskl.utils.intToHex(pixel)
        }
      }
      art[row][col] = palette[pixel].id
    })
    palette = Object.keys(palette).reduce((obj, attr) => {
      obj[palette[attr].id] = palette[attr].color
      return obj
    }, {})
    art = art.map(row => row.join(''))

    return { art, palette }
  })

HI! How can this be used? I'm trying to export Piskel to JSON instead of C.

Opening Piskel and running this code in the console