ta'anit means fast - and this section discusses the community fasts that are decreed in times of drought. it is part of the ritual of praying for rain, which begins around succot time. Ta'anit begins by discussing when these rain prayers should begin, at the beginning or end of succot festival. And describes there being a key to unlock the rain.
Since this mesechet is linked to succot I decided to do these drawings in blue pencil, to echo the blue biro drawings of mesechet succot.