Attiny wake up using external interrupt

Hey, I’m trying to find a way to get the attiny45 to run a simple sketch(I.e. blink an led) then attach an interrupt and enter into sleep mode. The interrupt is a physical switch and I would like for it to be triggered by a CHANGE. I have a problem though, every time I do this, either the 45 just skips the sleep mode function all together, or I can’t get it to wake up. Could anyone help out? Thanks.

P.s. I’m using the 8mhz bootloader on the 45,97455.0.html
#6, fifth bullet.