How to make a long audio clip with looped microphone input ?

Hi I am working on recording and playing the audio clips like talking tom app.

I have to record sound and then play it, but the recording will start and end at some specific level of audio input in microphone.
I have the idea that record 1 second loop clip from microphone, and then save that looped audio into long audio clip.
Thanks in advance, will appreciate any suggestion.