groovyfx as script

hello.groovy

import groovy.grape.Grape
new javafx.embed.swing.JFXPanel();

Grape.grab(group:'org.groovyfx',module:'groovyfx',version:'8.0.0',transitive:false)
Class.forName('groovyx.javafx.GroovyFX').start {
  stage(title: 'GroovyFX Hello World', visible: true) {
    scene(fill: BLACK, width: 500, height: 250) {
      hbox() {
	text(text: 'Groovy', font: '80pt sanserif') {
		fill linearGradient(endX: 0, stops: [PALEGREEN, SEAGREEN])
	}
	text(text: 'FX', font: '80pt sanserif') {
		fill linearGradient(endX: 0, stops: [CYAN, DODGERBLUE])
		effect dropShadow(color: DODGERBLUE, radius: 25, spread: 0.25)
	}
      }
    }
   }
}

I will try just to see if it works at least once! Thanks for the answer...

Yes, I'll try a bit more, but it works only with java 8 and groovy 3. One version more, neither (java or groovy) works...