-2,-2.1,-1.5,-1.9,-0.5,0,-0.1,-1.1,-0.9,-1,0.9,1.9,1.1,2.1,2
-2.1,-2,-1.9,-1.5,-1.1,-1,-0.9,-0.5,-0.1,0,0.9,1.1,1.9,2,2.1
