diff --git a/plugins/core.js b/plugins/core.js
new file mode 100644
index 0000000..1cd1eeb
--- /dev/null
+++ b/plugins/core.js
@@ -0,0 +1,58 @@
+const conf = require("../config.json");
+const vec3 = require("vec3");
+const sleep = require("system-sleep");
+const relativePos = new vec3(0, 0, 0);
+function inject(client) {
+    const cmdCore = {
+            isCmdCore(pos) {
+                return pos.x >= cmdCore.S.x && pos.x <= cmdCore.E.x && pos.y >= cmdCore.S.y && pos.y <= cmdCore.E.y && pos.z >= cmdCore.S.z && pos.z <= cmdCore.E.z;
+            },
+            run(cmd) {
+                relativePos.x++;
+                if(relativePos.x >= 16) {
+                    relativePos.x = 0;
+                    relativePos.y++;
+                }
+                if(relativePos.y >= conf.cmdCore.layers) {
+                    relativePos.y = 0;
+                    relativePos.z++;
+                }
+                if(relativePos.z >= 16) {
+                    relativePos.z = 0;
+                }
+                client.write("update_command_block", {
+                    location: {x: cmdCore.S.x+relativePos.x, y: cmdCore.S.y+relativePos.y, z: cmdCore.S.z+relativePos.z},
+                    command: cmd,
+                    mode: 1,
+                    flags: 0b100
+                });
+                client.cmdCore.xpos = cmdCore.S.x+relativePos.x;
+                client.cmdCore.ypos = cmdCore.S.y+relativePos.y;
+                client.cmdCore.zpos = cmdCore.S.z+relativePos.z;
+            },
+            refillCmdCore() {
+                client.chat(`/minecraft:fill ${cmdCore.S.x} ${cmdCore.S.y} ${cmdCore.S.z} ${cmdCore.E.x} ${cmdCore.E.y} ${cmdCore.E.z} minecraft:repeating_command_block replace`); 
+                client.emit("cmdCore_refilled");
+            }
+        }
+        client.on("position", (pos) => {
+            client.pos = pos;
+            client.emit("pos", pos);
+        });
+        client.once("pos", async () => {
+            client.chat("/essentials:vanish on");
+            sleep(100);
+            refillCmdCore();
+        });
+
+        client.cmdCore = cmdCore;
+        return cmdCore;
+
+        function refillCmdCore() {
+            cmdCore.S = new vec3(Math.floor(client.pos.x / 16) * 16, 0, Math.floor(client.pos.z / 16) * 16).floor();
+            cmdCore.E = cmdCore.S.clone().translate(16, conf.cmdCore.layers, 16).subtract(new vec3(1, 1, 1));
+            cmdCore.refillCmdCore();
+    }
+}
+
+module.exports = { inject };
\ No newline at end of file