GLE Example: 2.gle

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size 6.9 1 ! 4*x1+2*d+d1 y+2*d

include "feyn.gle"

x = 1
x1 = 1.5
d = 0.1
d1 = 0.7
r = 0.05
y = 0.75*x
a = 1.75*doublea

sub quad x y
    amove x-a y-a
    begin path fill black
        rline 2*a 0
        rline 0 2*a
        rline -2*a 0
        rline 0 -2*a
    end path
    amove x y
end sub

begin translate x1+d d ! a
    amove -x1 0
    @double x1 0
    amove -x 0
    circle r fill black
    @photon2 0 y x 0
    circle r fill black
    @quad 0 0
end translate

begin translate 3*x1+d1+d d ! b
    amove -x1 0
    @double x1 0
    amove -x 0
    @photon2 0 y x 0
    circle r fill black
    @quad -1 0
end translate

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