yes

term.clear()
term.setCursorPos(1,1)
x = 0
y = 0
function rd()
 x, y = x + 1, y + 1
 sleep(0.1)
 term.setCursorPos(x,y)
 write("O")
end
function ru()
 x, y = x + 1, y - 1
 sleep(0.1)
 term.setCursorPos(x,y)
 write("O")
end
function ld()
 x, y = x - 1, y + 1
 sleep(0.1)
 term.setCursorPos(x,y)
 write("O")
end
function lu()
 x, y = x - 1, y - 1
 sleep(0.1)
 term.setCursorPos(x,y)
 write("O")
end

while true do
    repeat
        if y == 18 then
            repeat
            rd()
            until y == 1 or x == 50
        end
        if y == 1 then
            repeat
            ru()
            until y == 18 or x == 50
        end
    until x == 50
    repeat
        if y < 18 then
            repeat
            ld()
            until y == 1 or x == 1
        end
        if y > 1 then
            repeat
            lu()
            until y == 18 or x == 1
        end
    until x == 1
end