x0 >=  0.6 
x0 <  0.6798577687 
x1 >=  -0.5 
x1 <  0.5 
x2 >=  -0.5 
x2 <  0.5 
x3 >=  0.45 
x3 <  0.5 
x4 >=  -0.5 
x4 <  -0.45 
y0 <  3.9911256459