sablon.json

{
   "type":"Stack",
   "alignment":"topLeft",
   "children":[
      {
         "type":"Positioned",
         "top":20.0,
         "left":20.0,
         "child":{
            "type":"Container",
            "color":"#FFC300",
            "alignment":"center",
            "width":375.0,
            "height":300.0,
            "child":{
                "type":"Text",
               "data":"1. Kutu",
               "maxLines":3,
               "style":{
                  "color":"#FFFFFF",
                  "fontSize":20.0
               }
            }
         }
      },
      {
         "type":"Positioned",
         "top":20.0,
         "left":400.0,
         "child":{
            "type":"Container",
            "color":"#FF5733",
            "alignment":"center",
            "width":375.0,
            "height":300.0,
            "child":{
               "type":"Text",
               "data":"2. Kutu",
               "maxLines":3,
               "style":{
                  "color":"#FFFFFF",
                  "fontSize":20.0
               }
            }
         }
      },
      {
         "type":"Positioned",
         "top":335.0,
         "left":20.0,
         "child":{
            "type":"Container",
            "color":"#C70039",
            "alignment":"center",
            "width":750.0,
            "height":400.0,
            "child":{
               "type":"Text",
               "data":"3. Kutu",
               "maxLines":3,
               "style":{
                  "color":"#FFFFFF",
                  "fontSize":20.0
               }
            }
         }
      }
   ]
}