help with my circuit

hi, i have made a circuit in which a 555 astable circuit pulses to a 4017 decade counter which lights 5 LED's then starts again, what i want to know is can i have the previous light dimming as the next LED lights so it leaves a "fading trail" behind it?

i was thinking capacitors? if i could do that, what type of values should i try and how would i wire them?

Thanks
Mike

This should work:

thanks, i will give that a go