Demos: ensure all use fun main() = application {

- Adjust some demo window sizes.
- Replace Random.double by Double.uniform
- Tweak some demos so screenshots look more interesting

orx-fcurve/src/jvmDemo/kotlin/DemoMultiFCurve01.kt

@@ -3,26 +3,26 @@ import org.openrndr.extra.fcurve.MultiFCurve
 import org.openrndr.extra.fcurve.fcurve
 import org.openrndr.extra.fcurve.vector2
 
-fun main() {
-    application {
-        configure {
-            width = 720
-            height = 720
-        }
-        program {
-            class XYAnimation : MultiFCurve(mapOf(
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
+    program {
+        class XYAnimation : MultiFCurve(
+            mapOf(
                 "x" to fcurve("M0 Q4,360,5,720"),
                 "y" to fcurve("M360 h5")
-            )) {
-                val position = vector2("x", "y")
-            }
+            )
+        ) {
+            val position = vector2("x", "y")
+        }
 
-            val xyAnimation = XYAnimation()
-            val position = xyAnimation.position.sampler()
+        val xyAnimation = XYAnimation()
+        val position = xyAnimation.position.sampler()
 
-            extend {
-                drawer.circle(position(seconds.mod(5.0)), 100.0)
-            }
+        extend {
+            drawer.circle(position(seconds.mod(5.0)), 100.0)
         }
     }
-}
+}