Fix demos (#331)

orx-composition/src/jvmDemo/kotlin/DemoCompositionDrawer01.kt

@@ -0,0 +1,42 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.composition.composition
+import org.openrndr.extra.composition.drawComposition
+import org.openrndr.extra.svg.saveToFile
+import org.openrndr.extra.svg.toSVG
+import org.openrndr.math.Vector2
+import java.io.File
+
+fun main() {
+    application {
+        program {
+            val composition = drawComposition {
+                val layer = group {
+                    fill = ColorRGBa.PINK
+                    stroke = ColorRGBa.BLACK
+                    strokeWeight = 10.0
+                    circle(Vector2(width / 2.0, height / 2.0), 100.0)
+                    circle(Vector2(200.0, 200.0), 50.0)
+                }
+                // demonstrating how to set custom attributes on the CompositionNode
+                // these are stored in SVG
+                //layer.id = "Layer_2"
+                //layer.attributes["inkscape:label"] = "Layer 1"
+                //layer.attributes["inkscape:groupmode"] = "layer"
+            }
+
+            // print the svg to the console
+            println(composition.toSVG())
+
+            // save svg to a File
+            //composition.saveToFile(File("/path/to/design.svg"))
+
+            extend {
+                drawer.clear(ColorRGBa.WHITE)
+
+                // draw the composition to the screen
+                drawer.composition(composition)
+            }
+        }
+    }
+}