LED sequence help

im trying to do two things....

one would be "pull a trigger" and have a simple chase across a series of LED lights...one to the next....

the second thing i would want to do (same system or a different build) be able to pull the trigger and go down the sequence one LED to the next down the series of LEDs pull trigger, first LED lights up....pull again, first LED goes out, second comes on...etc

if i could do it through the same chip, that would be awesome...but if not, i would try to do each on seperate chips....