// method to render apple location
private void RenderApple()
{
bool isit = true;
do
{
apple.RenderLocation();
appleBox.Location = apple.Location;
for (int i = 1; i < lenght; ++i)
{
if (apple.Location != tails[tick - i].Location)
{
isit = false;
}
}
} while (isit == true);
}