diff --git a/arch/textwindow.cc b/arch/textwindow.cc
index 67d942b..0f20235 100644
--- a/arch/textwindow.cc
+++ b/arch/textwindow.cc
@@ -44,9 +44,9 @@ void TextWindow::print(const char* str, size_t length, CGA::Attribute attrib) {
         unsigned x_now, y_now;
         getPos(x_now, y_now);
         CGA::show(x_now, y_now, str[i], attrib);
-        if(from_col+x_now >= to_col){
+        if(from_col+x_now >= to_col-1){
             x_now = 0;
-            if(from_row + y_now >= to_row){
+            if(from_row + y_now >= to_row-1){
                 //scrollUp()
             }
             else{
diff --git a/main.cc b/main.cc
index 7d6b5fc..ae51681 100644
--- a/main.cc
+++ b/main.cc
@@ -20,6 +20,9 @@ extern "C" int main() {
   //  CGA::show(i, i, i+0x30, CGA::Attribute());
 
   //test textwindow implemantation
+  TextWindow tw_global = TextWindow(0, 80, 0, 25, true);
+  tw_global.reset(' ', CGA::Attribute(CGA::LIGHT_GREEN, CGA::BLUE, false));
+
   TextWindow tw = TextWindow(0, 10, 0, 10, true);
   tw.reset();
   tw.setPos(0,0);