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-turtle/src/jvmDemo/kotlin/DemoTurtle02.kt

@@ -9,20 +9,18 @@ import org.openrndr.extra.turtle.turtle
 import org.openrndr.math.Vector2
 import kotlin.random.Random
 
-fun main() {
-    application {
-        program {
-            val r = Random(40)
-            val contours = turtle(drawer.bounds.center + Vector2(-50.0, 50.0)) {
-                for (i in 0 until 500) {
-                    rotate(Double.uniform(-90.0, 90.0, r))
-                    forward(Double.uniform(10.0, 40.0, r))
-                }
-            }
-            extend {
-                drawer.stroke = ColorRGBa.PINK
-                drawer.contours(contours)
+fun main() = application {
+    program {
+        val r = Random(40)
+        val contours = turtle(drawer.bounds.center + Vector2(-50.0, 50.0)) {
+            for (i in 0 until 500) {
+                rotate(Double.uniform(-90.0, 90.0, r))
+                forward(Double.uniform(10.0, 40.0, r))
             }
         }
+        extend {
+            drawer.stroke = ColorRGBa.PINK
+            drawer.contours(contours)
+        }
     }
-}
+}