LED matrix 16x8 - Demo

Hello! I'm Rewers. It's my 2nd project - LED matrix 16x8, controlled by LPT. This is my first acquaintance with the chips :) Was used 8-bit register, 4-bit counter, 4-line to 16-line binary-decimal decoder. The basic scheme was taken here "http://www.radiokot.ru/circuit/light/run/11/" and decreased to half.