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var palette = (function(){

  var palette = new Matrix (32, 2, function(x,y){
    var lex = new Lex (x,y)
    lex.bg = all_inv_hue(x>>1)
    lex.build()
    return lex
  })

  palette.bind = function(){
    palette.forEach(function(lex, x, y){
      if (lex.bound) return
      lex.bound = true

      lex.span.addEventListener('mousedown', function(e){
        e.preventDefault()
        dragging = true
        erasing = e.which == "3"
        brush.fg = lex.bg
        brush.bg = lex.bg
        if (! brush.modified) {
          brush.generate()
        }
      })

    })
  }
  
  return palette

})()