diff --git a/js/PElems/Node.ts b/js/PElems/Node.ts
index d885ad5..6f5dfda 100644
--- a/js/PElems/Node.ts
+++ b/js/PElems/Node.ts
@@ -1,4 +1,4 @@
-import { svgNodes } from "..";
+import { svgNodes, update } from "..";
 import { SVGNode } from "../graphics/SVGNode";
 import { Positionable } from "../types";
 import { Edge } from "./Edge";
@@ -20,6 +20,10 @@ export class Node implements Positionable {
         this.renderedElement = new SVGNode(this);
         this.renderedElement.appendIt(svgNodes);
         this.renderedElement.onMove((event) => this.updatePosition(event.x, event.y));
+        this.renderedElement.onClick((event) => {
+            if (this.marks < this.capacity) this.marks++
+            update();
+        })
     }
 
     updatePoints() {
diff --git a/js/PElems/Transition.ts b/js/PElems/Transition.ts
index cd8d832..468aca9 100644
--- a/js/PElems/Transition.ts
+++ b/js/PElems/Transition.ts
@@ -18,7 +18,9 @@ export class Transition implements Positionable {
         this.renderedElement.appendIt(svgNodes);
         this.renderedElement.onMove((event) => this.updatePosition(event.x, event.y));
     }
+    #canFireC = false;
     canFire() {
+        this.#canFireC = false;
         for (const inE of this.inEdges) {
             if (!inE.canSuck()) {
                 this.renderedElement.setCanFire(false);
@@ -32,10 +34,15 @@ export class Transition implements Positionable {
             }
         }
         this.renderedElement.setCanFire(true);
+        this.#canFireC = true;
         return true;
     }
     fire() {
-        if (!this.canFire()) return false;
+        let canFireNow = this.canFire()
+        if(this.#canFireC && !canFireNow){
+            // TODO: koflikt.
+        }
+        if (!this.#canFireC || !canFireNow) return false;
         for (const inE of this.inEdges) {
             inE.suck();
         }
diff --git a/js/graphics/tragable.ts b/js/graphics/tragable.ts
index 458fceb..3180e3b 100644
--- a/js/graphics/tragable.ts
+++ b/js/graphics/tragable.ts
@@ -24,7 +24,7 @@ export class Tragable {
         svg.addEventListener('mouseleave', event => {
             selected = false;
         });
-        svg.addEventListener('click', event => {
+        element.addEventListener('click', event => {
             if (!selected) this.#clickCB(event);
         });
     }
diff --git a/js/index.ts b/js/index.ts
index 7527036..ea5fee8 100644
--- a/js/index.ts
+++ b/js/index.ts
@@ -15,14 +15,17 @@ svg.appendChild(svgNodes);
 let transitions: Transition[] = [];
 let nodes: Node[] = [];
 
-function loop() {
+async function loop() {
+    for (const trans of transitions) {
+        trans.canFire();
+    }
     for (const trans of transitions) {
         console.log(trans.name, trans.fire());
     }
     update();
 }
 
-function update() {
+export function update() {
     for (const nod of nodes) {
         nod.updatePoints();
     }
@@ -36,12 +39,20 @@ window.onresize = () => {
 }
 window.onresize(null as any);
 
+setInterval(loop, 1000);
 
 let n1 = new Node("n1", 100, 100);
 let n2 = new Node("n2", 100, 300);
+let n3 = new Node("n3", 200, 200);
 let t1 = new Transition("t1", 100, 200);
+let t2 = new Transition("t2", 150, 250);
+let t3 = new Transition("t3", 150, 150);
 t1.inEdges.push(new Edge(n1, t1, true))
 t1.outEdges.push(new Edge(n2, t1, false));
+t2.inEdges.push(new Edge(n2, t2, true))
+t2.outEdges.push(new Edge(n3, t2, false));
+t3.inEdges.push(new Edge(n3, t3, true))
+t3.outEdges.push(new Edge(n1, t3, false));
 
-nodes.push(n1, n2);
-transitions.push(t1);
\ No newline at end of file
+nodes.push(n1, n2, n3);
+transitions.push(t1, t2, t3);
\ No newline at end of file