What does Sebastian and antonios treatment of Gonzalo foreshadow in the second act ?

 Antonio and Sebastian are rather mean spirited to Gonzolo. They mock Gonzalo's upbeat attitude. While Gonzalo sees the Island as having "lush and lusty grass," Antonio and Sebastian see it as rank and gross. They call Gonzago's words of comfort “cold porridge." This foreshadows Antonio and Sebastian's scheming in Act 2.