diff --git a/js/simulate.js b/js/simulate.js
new file mode 100644
index 0000000..2b46f1b
--- /dev/null
+++ b/js/simulate.js
@@ -0,0 +1,215 @@
+let simulationStates = [];
+let singleCharMode = true;
+let simulationStepDuration = 500;
+
+function simulate(word) {
+    let steps = [];
+
+    if (singleCharMode) {
+        steps = word.split('');
+    } else {
+        steps = word.split(/ /g);
+    }
+
+    simulationStates.forEach(state => {
+        state.isActive = false;
+    });
+    simulationStates.splice();
+
+    const startConnections = connections.filter(conn => conn instanceof StartConnection);
+    startConnections.forEach(connection => animations.push(new ConnectionAnimation(connection)));
+    simulationStates = startConnections.map(conn => conn.state);
+
+    setTimeout(() => {
+        simulationStates.forEach(state => {
+            state.isActive = true;
+            state.activeTime = Date.now();
+        });
+
+        let stepIndex = 0;
+        const stepInterval = setInterval(() => {
+            if (stepIndex >= steps.length) {
+                clearInterval(stepInterval);
+                return;
+            }
+
+            simulationStep(steps[stepIndex]);
+            stepIndex++;
+        }, simulationStepDuration * 4);
+    }, simulationStepDuration);
+}
+
+function simulationStep(input) {
+    const len = simulationStates.length;
+    for (let i = 0; i < len; i++) {
+        const state = simulationStates[i];
+        const possibilities = getOutgoingConnections(state);
+
+        simulationStates.splice(0, 1);
+        state.isActive = false;
+        state.activeTime = Date.now();
+
+        possibilities.forEach(conn => {
+            const conditions = conn.text.split(/, ?/g);
+
+            console.log(conn, conditions);
+
+            if (input.match(new RegExp(conditions.join('|'), 'g'))) {
+                if (conn instanceof Connection) {
+                    animations.push(new ConnectionAnimation(conn));
+
+                    setTimeout(() => {
+                        simulationStates.push(conn.stateB);
+                        conn.stateB.isActive = true;
+                        conn.stateB.activeTime = Date.now();
+                    }, simulationStepDuration);
+                } else if (conn instanceof SelfConnection) {
+                    animations.push(new SelfConnectionAnimation(conn));
+
+                    setTimeout(() => {
+                        simulationStates.push(conn.state);
+                        conn.state.isActive = true;
+                        conn.state.activeTime = Date.now();
+                    }, simulationStepDuration);
+                }
+            }
+        });
+    }
+}
+
+function getOutgoingConnections(state) {
+    return connections.filter(connection => connection instanceof SelfConnection ? connection.state === state : connection.stateA === state);
+}
+
+class ConnectionAnimation {
+
+    constructor(connection) {
+        this.connection = connection;
+        this.startTime = Date.now();
+    }
+
+    getSize(percent) {
+        if (percent < .33) {
+            return easeInOutCubic(percent * 3) * 10;
+        } else if (percent < .66) {
+            return 10;
+        } else {
+            return easeInOutCubic(1 - (percent - .8) * 3) * 10;
+        }
+    }
+
+    getPosLinear(percent, points) {
+
+    }
+
+    getPosCircular(percent, points) {
+        const distanceSquared = (points.end.x - points.start.x) ** 2 + (points.end.y - points.start.y) ** 2;
+        let phi = Math.acos(1 - (distanceSquared / (2 * points.circle.radius ** 2)));
+
+        if (distanceSquared > points.circle.radius ** 2) {
+            phi = 2 * Math.PI - phi;
+        }
+
+        let deltaPhi = phi * percent;
+
+        const startX = points.start.x - points.circle.x;
+        const startY = points.start.y - points.circle.y;
+
+        if (!points.isReversed) {
+            deltaPhi *= -1;
+        }
+
+        const x = startX * Math.cos(deltaPhi) + startY * Math.sin(deltaPhi) + points.circle.x;
+        const y = -startX * Math.sin(deltaPhi) + startY * Math.cos(deltaPhi) + points.circle.y;
+
+        return {x, y};
+    }
+
+    draw() {
+        const deltaTime = Date.now() - this.startTime;
+        const percent = Math.min(Math.max(deltaTime / simulationStepDuration, 0), 1);
+
+        let curX = 0;
+        let curY = 0;
+
+        const endPoints = this.connection instanceof StartConnection ? this.connection.getEndPoints() : this.connection.getEndPointsAndCircle();
+
+        if (endPoints.isCircle) {
+            const pos = this.getPosCircular(percent, endPoints);
+
+            curX = pos.x;
+            curY = pos.y;
+        } else {
+            const deltaX = endPoints.end.x - endPoints.start.x;
+            const deltaY = endPoints.end.y - endPoints.start.y;
+
+            curX = endPoints.start.x + deltaX * percent;
+            curY = endPoints.start.y + deltaY * percent;
+        }
+
+        ctx.fillStyle = '#0f0';
+
+        ctx.beginPath();
+
+        ctx.arc(curX, curY, this.getSize(percent), 0, 2 * Math.PI);
+        ctx.fill();
+
+        ctx.closePath();
+
+        if (percent >= 1) {
+            animations.splice(animations.findIndex(anim => anim === this), 1);
+        }
+    }
+
+}
+
+class SelfConnectionAnimation {
+
+    constructor(connection) {
+        this.connection = connection;
+        this.startTime = Date.now();
+    }
+
+    draw() {
+        const deltaTime = Date.now() - this.startTime;
+        const percent = Math.min(Math.max(deltaTime / simulationStepDuration, 0), 1);
+
+        const endPoints = this.connection.getEndPointsAndCircle();
+
+        const distanceSquared = (endPoints.end.x - endPoints.start.x) ** 2 + (endPoints.end.y - endPoints.start.y) ** 2;
+        let phi = Math.acos(1 - (distanceSquared / (2 * endPoints.circle.radius ** 2)));
+
+        if (distanceSquared > endPoints.circle.radius ** 2) {
+            phi = 2 * Math.PI - phi;
+        }
+
+        let deltaPhi = phi * percent;
+
+        const startX = endPoints.start.x - endPoints.circle.x;
+        const startY = endPoints.start.y - endPoints.circle.y;
+
+        if (!endPoints.isReversed) {
+            deltaPhi *= -1;
+        }
+
+        let x = startX * Math.cos(deltaPhi) + startY * Math.sin(deltaPhi) + endPoints.circle.x;
+        let y = -startX * Math.sin(deltaPhi) + startY * Math.cos(deltaPhi) + endPoints.circle.y;
+
+        ctx.fillStyle = '#0f0';
+
+        ctx.beginPath();
+
+        ctx.arc(x, y, 10, 0, 2 * Math.PI);
+        ctx.fill();
+
+        ctx.closePath();
+
+        if (percent >= 1) {
+            animations.splice(animations.findIndex(anim => anim === this), 1);
+        }
+    }
+}
+
+function easeInOutCubic(t) {
+    return t < .5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1
+}
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