{
  "layout": {
    "style": {
      "wrap": "wrap",
      "align-items": "center",
      "justify-content": "space-between"
    },
    "children": [
      {
        "repeat": "${for(1000).select(n->randomInt(20,60))}",
        "style": {
          "width": "${_item_}",
          "height": "${_item_}",
          "background-color": "blue",
          "margin": 2
        }
      }
    ]
  }
}