d3.transition()
      .duration(3000)
      .on("start", function(){
        // Scale for radius
        var xr_1 = d3.scaleLinear().domain([0, 100]).range([0, 40]);

        var positions_data_0 = {
          minx1:120, maxx1:80, miny1:80, maxy1:180,
          minx2:150, maxx2:50, miny2:150, maxy2:250
        }
        var positions_0 = generatePosition(positions_data_0)

        setTimeout(function(){ update(positions_0, xr_1) }, 500);}
      )
      .end().then(function(){
        d3.transition()
          .duration(3000)
          .on("start", function(){
            var xr_1 = d3.scaleLinear().domain([0, 100]).range([0, 40]);
            var positions_data_1 = {
              minx1:120, maxx1:80, miny1:100, maxy1:200,
              minx2:150, maxx2:50, miny2:100, maxy2:150
            }
            var positions_1 = generatePosition(positions_data_1)
            update(positions_1, xr_1)
            setInterval(function(){ update(positions_1, xr_1) }, 1000);})
          .end().then(function(){
            d3.transition()
              .duration(3000)
              .on("start", function(){
                // Scale for radius
                var xr_2 = d3.scaleLinear().domain([0, 100]).range([0, 20]);

                var positions_data_2 = {
                  minx1:120, maxx1:60, miny1:0, maxy1:100,
                  minx2:120, maxx2:60, miny2:0, maxy2:150
                }
                var positions_2 = generatePosition(positions_data_2)
                setInterval(function(){ update(positions_2, xr_2) }, 1500);})
              .end().then(function(){
              })
          })
      })