Task 

Task 1
 

At the begining of program, store to the EEPROM memory a set of following values for different LEDs states (active high - 1=>led on):
GP5/GP4/GP3/GP2/GP1/GP0
110111
010110
000100
000000
000100
010110

Then use delay functions in C (e.g. __delay_ms(x) ) for measuring cca 0,5sec and then change the state of diods -> load to GPIO first value from EEPROM, at next interrupt load second value from EEPROM etc. and at the end start from begining.