diff --git a/src/me/topchetoeu/jscript/compilation/Instruction.java b/src/me/topchetoeu/jscript/compilation/Instruction.java
index 2d9c21d..e589f4f 100644
--- a/src/me/topchetoeu/jscript/compilation/Instruction.java
+++ b/src/me/topchetoeu/jscript/compilation/Instruction.java
@@ -34,7 +34,6 @@ public class Instruction {
         LOAD_REGEX,
 
         DUP,
-        MOVE,
 
         STORE_VAR,
         STORE_MEMBER,
@@ -46,46 +45,6 @@ public class Instruction {
 
         TYPEOF,
         OPERATION;
-        // TYPEOF,
-        // INSTANCEOF(true),
-        // IN(true),
-
-        // MULTIPLY(true),
-        // DIVIDE(true),
-        // MODULO(true),
-        // ADD(true),
-        // SUBTRACT(true),
-
-        // USHIFT_RIGHT(true),
-        // SHIFT_RIGHT(true),
-        // SHIFT_LEFT(true),
-
-        // GREATER(true),
-        // LESS(true),
-        // GREATER_EQUALS(true),
-        // LESS_EQUALS(true),
-        // LOOSE_EQUALS(true),
-        // LOOSE_NOT_EQUALS(true),
-        // EQUALS(true),
-        // NOT_EQUALS(true),
-
-        // AND(true),
-        // OR(true),
-        // XOR(true),
-
-        // NEG(true),
-        // POS(true),
-        // NOT(true),
-        // INVERSE(true);
-
-        // final boolean isOperation;
-
-        // private Type(boolean isOperation) {
-        //     this.isOperation = isOperation;
-        // }
-        // private Type() {
-        //     this(false);
-        // }
     }
     public static enum BreakpointType {
         NONE,
@@ -240,13 +199,10 @@ public class Instruction {
         return new Instruction(loc, Type.LOAD_ARR, count);
     }
     public static Instruction dup(Location loc) {
-        return new Instruction(loc, Type.DUP, 0, 1);
+        return new Instruction(loc, Type.DUP, 1);
     }
-    public static Instruction dup(Location loc, int count, int offset) {
-        return new Instruction(loc, Type.DUP, offset, count);
-    }
-    public static Instruction move(Location loc, int count, int offset) {
-        return new Instruction(loc, Type.MOVE, offset, count);
+    public static Instruction dup(Location loc, int count) {
+        return new Instruction(loc, Type.DUP, count);
     }
 
     public static Instruction storeSelfFunc(Location loc, int i) {
diff --git a/src/me/topchetoeu/jscript/compilation/values/IndexAssignStatement.java b/src/me/topchetoeu/jscript/compilation/values/IndexAssignStatement.java
index a67251d..77cb68c 100644
--- a/src/me/topchetoeu/jscript/compilation/values/IndexAssignStatement.java
+++ b/src/me/topchetoeu/jscript/compilation/values/IndexAssignStatement.java
@@ -19,7 +19,7 @@ public class IndexAssignStatement extends Statement {
         if (operation != null) {
             object.compile(target, scope, true);
             index.compile(target, scope, true);
-            target.add(Instruction.dup(loc(), 2, 0));
+            target.add(Instruction.dup(loc(), 2));
 
             target.add(Instruction.loadMember(loc()));
             value.compile(target, scope, true);
diff --git a/src/me/topchetoeu/jscript/engine/frame/Runners.java b/src/me/topchetoeu/jscript/engine/frame/Runners.java
index 862ce83..f2564fb 100644
--- a/src/me/topchetoeu/jscript/engine/frame/Runners.java
+++ b/src/me/topchetoeu/jscript/engine/frame/Runners.java
@@ -119,27 +119,15 @@ public class Runners {
     }
 
     public static Object execDup(Context ctx, Instruction instr, CodeFrame frame) {
-        int offset = instr.get(0), count = instr.get(1);
+        int count = instr.get(0);
 
         for (var i = 0; i < count; i++) {
-            frame.push(ctx, frame.peek(offset + count - 1));
+            frame.push(ctx, frame.peek(count - 1));
         }
 
         frame.codePtr++;
         return NO_RETURN;
     }
-    public static Object execMove(Context ctx, Instruction instr, CodeFrame frame) {
-        int offset = instr.get(0), count = instr.get(1);
-
-        var tmp = frame.take(offset);
-        var res = frame.take(count);
-
-        for (var i = 0; i < offset; i++) frame.push(ctx, tmp[i]);
-        for (var i = 0; i < count; i++) frame.push(ctx, res[i]);
-
-        frame.codePtr++;
-        return NO_RETURN;
-    }
     public static Object execLoadUndefined(Context ctx, Instruction instr, CodeFrame frame) {
         frame.push(ctx, null);
         frame.codePtr++;
@@ -329,7 +317,6 @@ public class Runners {
             case TRY_END: return execTryEnd(ctx, instr, frame);
 
             case DUP: return execDup(ctx, instr, frame);
-            case MOVE: return execMove(ctx, instr, frame);
             case LOAD_VALUE: return execLoadValue(ctx, instr, frame);
             case LOAD_VAR: return execLoadVar(ctx, instr, frame);
             case LOAD_OBJ: return execLoadObj(ctx, instr, frame);
diff --git a/undefined b/undefined
deleted file mode 100644
index e69de29..0000000