Question 840480
{{{x=0}}},{{{0+y=3}}},{{{y=3}}}
{{{x=1}}},{{{1+y=3}}},{{{y=2}}}
{{{x=2}}},{{{2+y=3}}},{{{y=1}}}
{{{x=3}}},{{{3+y=3}}},{{{y=0}}}
{{{x=4}}},{{{4+y=3}}},{{{y=-1}}}
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{{{drawing(300,300,-2,6,-4,4,grid(1),
circle(0,3,0.1),
circle(1,2,0.1),
circle(2,1,0.1),
circle(3,0,0.1),
circle(4,-1,0.1),
line(0,3,4,-1))}}}