@Rattenjunge8080 So, i found a Solution, if anyone is interested, be my guest to copy this (spaghetti-code! I catch exceptions cause i am not able to check if and how many pictures are already loaded):

/* MagicMirror² * Module: Scare * * By Rattenjunge8080 * */ Module.register("Scare", { // Default module config. defaults: { }, start: function(){ //The container which will be shown in DOM this.container = document.createElement("div"); this.visible = true; //set true via resume this.blocker = false; //block multiple DOM-calls image1 = document.createElement("img"); image1.src = '/modules/Scare/img1.jpg'; image1.classList.add("image1"); image2 = document.createElement("img"); image2.src = '/modules/Scare/img2.jpg'; image2.classList.add("image2"); }, // system notification your module is being hidden // typically you would stop doing UI updates (getDom/updateDom) if the module is hidden suspend: function(){ console.log('suspend'); this.visible = false; this.updateDom(1000); //TODO If in future not all pictures are removed->Delete the container: //this.container.remove(); }, // system notification your module is being unhidden/shown // typically you would resume doing UI updates (getDom/updateDom) if the module is shown resume: function(){ console.log('resume'); //TODO If in future not all pictures are removed->add here the container: //this.container = document.createElement("div"); this.visible = true; this.updateDom(); }, /* * Here the first Image will be added to a container, shown on screen * and a timer will count down. Let them feel safe for a while... * then a new image will pop up and a sound is played */ showImageAndPlaySound() { this.blocker = true; //TODO: Maybe useful in future //this.container.innerHTML = "<img src=\"/modules/Scare/OVAL.png\" width=\"200px\" height=\"500px\">"; //Put in picture to let it print on DOM this.container.appendChild(image1); this.updateDom(); console.log("set timeout 10s"); try { setTimeout(() => this.container.removeChild(image1), 10000); }catch (e) {console.log("catch timeout line 70");} setTimeout(() => this.container.appendChild(image2), 10000); this.updateDom(); //Generate the Audio from local file TODO auch mit setTimeout machen var audio = new Audio("/modules/Scare/sound.mp3"); audio.play(); this.blocker = false; }, /* * Here the first Image will be added to a container, shown on screen * and a timer will count down. Let them feel safe for a while... * then a new image will pop up and a sound is played */ getDom: function(){ if(this.visible){ if(this.blocker === false){ this.showImageAndPlaySound(); }else{} }else{ //When the Module is not shown, then remove the 2 Images try { this.container.removeChild(image1); this.container.removeChild(image1); this.container.removeChild(image1); this.container.removeChild(image1); this.container.removeChild(image1); this.container.removeChild(image1); } catch (e) {console.log("catch remove child img 1");} try { this.container.removeChild(image2); this.container.removeChild(image2); this.container.removeChild(image2); this.container.removeChild(image2); this.container.removeChild(image2); this.container.removeChild(image2); }catch (e) {console.log("catch remove child img 2");} } return this.container; } });