After you press the button, the chip will randomly light up correct 

LEDs to indicate the roll of the die - 1 through 6. 

To make this, I used the following parts:

• 7 LEDs
  
• 200 ohm resistor (which can be varied to change the brightness of the LEDs)
• ATtiny85 chip
• Button
• Switch
• Button cell battery holder
• Blank perfboard
• Wires
• Solder
• To program chip, an Arduino and 10uf polarized capacitor.  

Link to the Arduino Code