64x16 led matrix

Hi

just got my Led Matrix and it is working great BUT…

the picture shows the display writing text but there is a block to the right that is blinking the letters out.
got the code from 64x16 RED Led Matrix

what i need help to is removing the red block at the end

cant poste code but is as an attachment

shortened_Final_Code_A.ino (17.5 KB)

here is the picture

the chips on the display is :

Controller SM74HC245D Driver SM74hc138d

have any one worked with them before...