diff --git a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreview.java b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreview.java
new file mode 100644
index 00000000..43ac2ff6
--- /dev/null
+++ b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreview.java
@@ -0,0 +1,23 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2020  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.simulator.preview;
+
+public class SimulatorPreview {
+}
diff --git a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java
new file mode 100644
index 00000000..e647b46d
--- /dev/null
+++ b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java
@@ -0,0 +1,123 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2020  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.simulator.preview;
+
+import org.bukkit.util.Vector;
+
+import java.util.Random;
+
+public class SimulatorPreviewTNT {
+
+    private static final Random random = new Random();
+
+    private boolean gravity = false;
+    private int fuse = 80;
+    private double x;
+    private double y;
+    private double z;
+    private double vx;
+    private double vy;
+    private double vz;
+
+    private boolean onGround;
+
+    public SimulatorPreviewTNT(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+
+        double d = random.nextDouble() * Math.PI * 2;
+        this.vx = -Math.sin(d) * 0.02;
+        this.vy = 0.2;
+        this.vz = -Math.cos(d) * 0.02;
+    }
+
+    public void tick() {
+        // Gravity
+        if (!gravity) {
+            vy -= 0.04;
+        }
+
+        // Movement
+        move();
+
+        // TODO: EffectsFromOtherBlocks
+
+        // Velocity * 0.98
+        vx *= 0.98;
+        vy *= 0.98;
+        vz *= 0.98;
+
+        // OnGround Velocity * 0.7 -0.5 0.7
+        if (false) {
+            vx *= 0.7;
+            vy *= -0.5;
+            vz *= 0.7;
+        }
+
+        // Decrease Fuse
+        fuse--;
+        if (fuse <= 0) {
+            // Explode on zero Fuse
+            explode();
+        } else {
+            // TODO: or do water Movement!
+        }
+    }
+
+    public void move() {
+        Vector vec = collide();
+        double d = vec.lengthSquared();
+        if (d > 1.0E-7 || new Vector(vx, vy, vz).lengthSquared() - d < 1.0E-7) {
+            x += vx;
+            y += vy;
+            z += vz;
+        }
+
+        boolean flag = !equal(vx, vec.getX());
+        boolean flag1 = !equal(vz, vec.getZ());
+        boolean horizontalCollision = flag || flag1;
+        if (Math.abs(vy) > 0.0F) {
+            boolean verticalCollision = vy != vec.getY();
+            onGround = verticalCollision && vy < (double) 0.0F;
+        }
+
+        if (horizontalCollision) {
+            if (flag) vx = 0;
+            if (flag1) vz = 0;
+        }
+        // TODO: Get Block -> updateEntityMovementAfterFallOn!
+        // TODO: Get BlockSpeedFactor multiply
+    }
+
+    public static boolean equal(double x, double y) {
+        return Math.abs(y - x) < (double) 1.0E-5F;
+    }
+
+    public Vector collide() {
+        if (x == 0 && y == 0 && z == 0) return new Vector(0, 0, 0);
+        // TODO: Implement rest!
+        return null;
+    }
+
+    public void explode() {
+        // TODO: Implement
+    }
+}