pub fn blank(width: usize, height: usize) -> Screen {
            Screen {
                width: width,
                height: height,
                pixels: vec![Pixel::off(); width * height],
            }
        }
/// Create a new blank `Screen` of given dimensions, with all pixels off.
Create a new blank `Screen` of given dimensions, with all pixels off.
Create a new blank ` Screen ` of given dimensions with all pixels off .
pub fn blank(width: usize, height: usize) -> Screen {
            Screen {
                width: width,
                height: height,
                pixels: vec![Pixel::off(); width * height],
            }
        }
pub fn blank ( width : usize , height : usize ) -> Screen { Screen { width : width , height : height , pixels : vec ! [ Pixel off ( ) width height ] , } }
Create a new blank `Screen` of given dimensions, with all pixels off.
Create a new blank ` Screen ` of given dimensions with all pixels off .
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