diff --git a/src/main.py b/src/main.py
index 9d05d4b..390c5fa 100644
--- a/src/main.py
+++ b/src/main.py
@@ -241,12 +241,34 @@ for i in file:
             else:
                 raise TypeError("Could not find variable type")
             bfcode += "<<[[<<]<<]<<<<<<<<"
+        elif "+=" in i:
+            if a.split("[")[0] in variables:
+                var = a.split("[")[0]
+                idx = int(a.split("[")[1].split("]")[0])
+                bfcode += ">>>>>>>>>>>>" + "[>>]>>" * variables.index(var) + ">>" * idx + ">"
+                bfcode += "+" * int(removeChar(i.split("+=")[1], " "))
+                bfcode += "<[[<<]<<]<<<<<<<<"
+            else:
+                raise NameError(f"Could not find variable {a.split("[")[0]}")
+        elif "-=" in i:
+            if a.split("[")[0] in variables:
+                var = a.split("[")[0]
+                idx = int(a.split("[")[1].split("]")[0])
+                bfcode += ">>>>>>>>>>>>" + "[>>]>>" * variables.index(var) + ">>" * idx + ">"
+                bfcode += "-" * int(removeChar(i.split("-=")[1], " "))
+                bfcode += "<[[<<]<<]<<<<<<<<"
+            else:
+                raise NameError(f"Could not find variable {a.split("[")[0]}")
         elif "=" in i:
             if a.split("[")[0] in variables:
                 var = a.split("[")[0]
                 idx = int(a.split("[")[1].split("]")[0])
                 bfcode += ">>>>>>>>>>>>" + "[>>]>>" * variables.index(var) + ">>" * idx + ">"
-                bfcode += "[-]" + "+" * ord(i.split("=", 1)[1].split("\"")[1])
+                if "\"" in i:
+                    replace = ord(i.split("=", 1)[1].split("\"")[1])
+                else:
+                    replace = int(i.split("=", 1)[1].lstrip().rstrip())
+                bfcode += "[-]" + "+" * replace
                 bfcode += "<[[<<]<<]<<<<<<<<"
             else:
                 raise NameError(f"Could not find variable {a.split("[")[0]}")
diff --git a/tests/create.basm b/tests/create.basm
index 31d6e3e..9a2f1fd 100644
--- a/tests/create.basm
+++ b/tests/create.basm
@@ -1,4 +1,4 @@
 create var *5 = "Hello"
 create var2 *5 = "World"
 set var[1] = "E"
-set var2[2] = "R"
\ No newline at end of file
+set var2[2] -= 1
\ No newline at end of file