need help with p.o.v section of slapped together tix clock

sorry, its a tix clock
so the top 2 blocks of leds display the hours
and the bottom 2 the minutes
i have it outputting to serial port at the moment ...
for example if it was 5:41 pm(17:41) it would display

or 6:45pm (18:45) it would show


attached is a better pic of my board...
20171029_1259154 (1).jpg
red lines are anodes attached to pins show on the right (rows)
black lines are cathodes attached to pins shown on top (columns)

i can light them up independantly for a self test.... but i do not know how to go about making them light up in sequence quickly to allow the different blocks to turn on simultaneously ... or rather alternatley but fast so persistance of vision makes it look like many are on at the same time.

20171029_1259154 (1).jpg