interfacing msp430g2 launchpad with multiplexed common anode seven segment display using energia

i would like to interface a multiplexed 4-digit-7-segment common anode display with msp430 g2 launchpad and display 4 numbers simultaneously.here the 4 digits are controlled by 4 BC547 transistors.

here the segments a,b,c,d,e,f,g,dp of the display are connected to port1 pins respectively and the transistors bases are connected to port2 pins.

i tried with single 7-segment display and it is working .when i extended to 4-digits i could not get the display.

could you please give me the code to display 4 numbers simultaneously.

thank you...