diff --git a/langsys/lang/NULL.LAN b/langsys/lang/NULL.LAN
new file mode 100644
index 0000000..9e26dfe
--- /dev/null
+++ b/langsys/lang/NULL.LAN
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/main.py b/main.py
index 0728d03..40f65bb 100644
--- a/main.py
+++ b/main.py
@@ -187,8 +187,8 @@ class previewrend:
         self._win.update()
 
     def select(self, x, y):
-        if f"{x}:{y}" in self._grid:
-            self._grid[f"{x}:{y}"].config(background="cyan")
+        if f"{int(x)}:{int(y)}" in self._grid:
+            self._grid[f"{int(x)}:{int(y)}"].config(background="cyan")
             self.update()
 
     def deselect(self, x, y):