diff --git a/gl.cc b/gl.cc
index 93c1c2f..9c0dacb 100644
--- a/gl.cc
+++ b/gl.cc
@@ -31,10 +31,20 @@ void pressButton(cont_state_t* controller_state, int button, T&& callback) {
 
 void initScreen() {
 	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
-
+	glViewport(0, 0, 640, 480);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	glOrtho(0, 640, 0, 480, -100, 100);
 	glMatrixMode(GL_PROJECTION);
 	glLoadIdentity();
-	glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
+}
+
+void glVertex3fNormalized(float x, float y, float z) {
+	int xSize, ySize;
+	xSize = 640;
+	ySize = 480;
+
+	glVertex3f(x * xSize, y * ySize, z);
 }
 
 void displayStuff() {
@@ -46,16 +56,16 @@ void displayStuff() {
 		glColor3f(0.5f, 0.0f, 1.0f);
 		glBegin(GL_POLYGON);
 			glColor3f(1.0f, 0.0f, 0.0f);
-			glVertex3f(0.25f, 0.25f, 0.0f);
+			glVertex3fNormalized(0.25f, 0.25f, 0.0f);
 
 			glColor3f(0.0f, 1.0f, 0.0f);
-			glVertex3f(0.75f, 0.25f, 0.0f);
+			glVertex3fNormalized(0.75f, 0.25f, 0.0f);
 
 			glColor3f(0.0f, 0.0f, 1.0f);
-			glVertex3f(0.75f, 0.75f, 0.0f);
+			glVertex3fNormalized(0.75f, 0.75f, 0.0f);
 
 			glColor3f(1.0f, 1.0f, 1.0f);
-			glVertex3f(0.25f, 0.75f, 0.0f);
+			glVertex3fNormalized(0.25f, 0.75f, 0.0f);
 		glEnd();
 	glPopMatrix();
 	// clang-format on