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-fx/src/jvmDemo/kotlin/DemoFluidDistort01.kt

@@ -5,28 +5,26 @@ import org.openrndr.extensions.SingleScreenshot
 import org.openrndr.extra.fx.distort.FluidDistort
 import org.openrndr.extra.fx.patterns.Checkers
 
-fun main() {
-    application {
-        program {
-            val fd = FluidDistort()
-            val checkers = Checkers()
+fun main() = application {
+    program {
+        val fd = FluidDistort()
+        val checkers = Checkers()
 
-            val image = colorBuffer(width, height)
-            val distorted = image.createEquivalent()
-            checkers.size = 64.0
-            checkers.apply(emptyArray(), image)
+        val image = colorBuffer(width, height)
+        val distorted = image.createEquivalent()
+        checkers.size = 64.0
+        checkers.apply(emptyArray(), image)
 
-            if (System.getProperty("takeScreenshot") == "true") {
-                extensions.filterIsInstance<SingleScreenshot>().forEach {
-                    it.delayFrames = 150
-                }
-            }
-            extend {
-                // Ensure >0.01 for a better screenshot
-                fd.blend = (mouse.position.x / width).coerceAtLeast(0.01)
-                fd.apply(image, distorted)
-                drawer.image(distorted)
+        if (System.getProperty("takeScreenshot") == "true") {
+            extensions.filterIsInstance<SingleScreenshot>().forEach {
+                it.delayFrames = 150
             }
         }
+        extend {
+            // Ensure >0.01 for a better screenshot
+            fd.blend = (mouse.position.x / width).coerceAtLeast(0.01)
+            fd.apply(image, distorted)
+            drawer.image(distorted)
+        }
     }
-}
+}