//Pascal ABC.NET v3.1 сборка 1219
Uses
graphAbc;
Var
x1,y1,x2,y2,i:integer;
begin
maximizewindow;
line(0,300,windowwidth,300);
line(300,0,300,windowheight);
y2:=300;
x2:=300;
setpencolor(clblue);
for i:=0 downto -3 do
begin
x1:=x2;
y1:=y2;
x2:=i*5+300;
y2:=(-sqr(x2-300)+300);
line(x1,y1,x2,y2);
end;
y2:=300;
x2:=300;
for i:=0 to 3 do
begin
x1:=x2;
y1:=y2;
x2:=i*5+300;
y2:=(-sqr(x2-300)+300);
line(x1,y1,x2,y2);
end;
end.