diff --git a/examples/embedded_linux_epd4in2/src/main.rs b/examples/embedded_linux_epd4in2/src/main.rs
index 6fff958..df77102 100644
--- a/examples/embedded_linux_epd4in2/src/main.rs
+++ b/examples/embedded_linux_epd4in2/src/main.rs
@@ -351,7 +351,7 @@ fn run() -> Result<(), std::io::Error> {
 
         epd4in2.update_frame(&mut spi, &display.buffer()).unwrap();
         epd4in2.display_frame(&mut spi).expect("display frame new graphics");
-        if i >= 20 {
+        if i >= limit {
             
             break;
         }
diff --git a/src/drawing.rs b/src/drawing.rs
index 98b7236..08b195c 100644
--- a/src/drawing.rs
+++ b/src/drawing.rs
@@ -98,12 +98,10 @@ impl Drawing<Color> for DisplayEink42BlackWhite {
 
             match color {
                 Color::Black => {
-                    //self.buffer[idx] &= !bit;
-                    self.buffer[idx] |= bit;
+                    self.buffer[idx] &= !bit;
                 }
                 Color::White => {
-                    //self.buffer[idx] |= bit;
-                    self.buffer[idx] &= !bit;
+                    self.buffer[idx] |= bit;
                 }
             }            
         }