Multiplex 7 segment during delay (external IC?)
Perhaps a MAX7219 would do what you want.


  The MAX7219CNG+ is a 8-digit serially interfaced LED Display Driver for LED matrix displays. 
  The MAX7219 is compact, serial input/output common-cathode display drivers that interface microprocessors (¦ÌPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays or 64 individual LEDs. 
  Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers and an 8x8 static RAM that stores each digit. 
  Only one external resistor is required to set the segment current for all LEDs. 
  A convenient 4-wire serial interface connects to all common ¦ÌPs.
  Individual digits may be addressed and updated without rewriting the entire display. 
  The MAX7219 also allow the user to select code-B decoding or no-decode for each digit.