update scene diagram

threejs/lessons/resources/scene-down.svg

@@ -2,7 +2,7 @@
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg width="100%" height="100%" viewBox="0 0 650 512" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" xmlns:serif="http://www.serif.com/" style="fill-rule:evenodd;clip-rule:evenodd;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:1.5;">
     <g transform="matrix(1.30527,4.23642e-18,0,4.39451,101.309,-502.263)">
-        <path d="M394.725,136L-60.761,136L166.621,195L177.911,195L394.725,136Z" style="fill:rgb(255,228,254);stroke:black;stroke-width:0.03px;"/>
+        <path d="M394.725,136L-60.761,136L166.621,195L177.911,195L394.725,136Z" style="fill:rgb(228,235,255);stroke:black;stroke-width:0.03px;"/>
     </g>
     <g transform="matrix(1,0,0,1,69,0)">
         <g transform="matrix(1,0,0,1,266,-2.22045e-16)">
@@ -86,7 +86,8 @@
     <g transform="matrix(1,0,0,1,68.9088,18)">
         <rect x="237" y="361" width="40" height="40" style="fill:rgb(170,170,170);stroke:black;stroke-width:1px;"/>
     </g>
-    <g transform="matrix(1,0,0,1,69,0)">
-        <rect x="221.909" y="221" width="70" height="70" style="fill:rgb(68,170,136);stroke:black;stroke-width:1px;"/>
+    <g transform="matrix(0.857143,0,0,0.857143,105.701,36.5714)">
+        <rect x="221.909" y="221" width="70" height="70" style="fill:rgb(68,170,136);stroke:black;stroke-width:1.17px;"/>
     </g>
+    <circle cx="325.939" cy="361.091" r="4.909" style="stroke:black;stroke-width:0.1px;"/>
 </svg>