# klein.ode
# differential equations on a klein bottle
x'=1
y'=a
global 1 x-1 {x=0}
global 1 y-1 {x=1-x;y=0}
par a=.987654321
@ xlo=0,ylo=0,xhi=1,yhi=1,xp=x,yp=y,dt=.01,lt=0
done