diff --git a/src/console_output.cc b/src/console_output.cc
index 20cbc41..4d467bf 100644
--- a/src/console_output.cc
+++ b/src/console_output.cc
@@ -81,11 +81,6 @@ void console_output::render() {
         }
 }
 
-void console_output::clear() {
-        contents.clear();
-        contents.reserve(DISPLAY_BUFFER_SIZE);
-}
-
 void console_output::print_char(const position &pos, const char ch,
                                 const int attr) {
         if (pos.x >= DISPLAY_WIDTH || pos.y >= DISPLAY_HEIGHT)
diff --git a/src/console_output.h b/src/console_output.h
index a6b5d44..4315e46 100644
--- a/src/console_output.h
+++ b/src/console_output.h
@@ -12,7 +12,6 @@ public:
         console_output(std::ostream &cout);
 
         void render() override;
-        void clear() override;
         void print_char(const position &pos,
                         const char ch, const int attr) override;
         void print_str(const position &pos,
diff --git a/src/display.cc b/src/display.cc
index c868fd4..4b9d63d 100644
--- a/src/display.cc
+++ b/src/display.cc
@@ -1,4 +1,15 @@
 #include "display.h"
 
 display::display():
-        contents{DISPLAY_BUFFER_SIZE, 0} {}
+        contents{DISPLAY_BUFFER_SIZE, 0} {
+        for (int i = 0; i < DISPLAY_BUFFER_SIZE; ++i)
+                contents.push_back(0);
+}
+
+void display::clear() {
+        contents.clear();
+        contents.reserve(DISPLAY_BUFFER_SIZE);
+
+        for (int i = 0; i < DISPLAY_BUFFER_SIZE; ++i)
+                contents.push_back(0);
+}
diff --git a/src/display.h b/src/display.h
index 06bd63a..b7f57b6 100644
--- a/src/display.h
+++ b/src/display.h
@@ -21,7 +21,7 @@ public:
         virtual void render() = 0;
 
         // Clears the contents buffer
-        virtual void clear() = 0;
+        virtual void clear();
 
         virtual void print_char(const position &pos, const char ch,
                                 const int attr =
diff --git a/src/file_output.cc b/src/file_output.cc
index 1ed9fa2..f1bc686 100644
--- a/src/file_output.cc
+++ b/src/file_output.cc
@@ -14,11 +14,6 @@ void file_output::render() {
         }
 }
 
-void file_output::clear() {
-        contents.clear();
-        contents.reserve(DISPLAY_BUFFER_SIZE);
-}
-
 void file_output::print_char(const position &pos, const char ch,
                              const int attr) {
         if (pos.x >= DISPLAY_WIDTH || pos.y >= DISPLAY_HEIGHT)
diff --git a/src/file_output.h b/src/file_output.h
index ff96ce5..c0754b3 100644
--- a/src/file_output.h
+++ b/src/file_output.h
@@ -11,7 +11,6 @@ public:
         file_output(std::ofstream &&ofs);
 
         void render() override;
-        void clear() override;
         void print_char(const position &pos,
                         const char ch, const int attr) override;
         void print_str(const position &pos,