g = {Circle[{0, 0}, 1/4, {0, Pi/2}],
Circle[{1, 1}, 3/4, {Pi, 3 Pi/2}],
Circle[{1, 0}, {1/4, 3/4}, {Pi/2, Pi}],
Circle[{0, 1}, {3/4, 1/4}, {3 Pi/2, 2 Pi}]};
Graphics[Table[
Translate[Rotate[g, RandomInteger[3] Pi/2, {1/2, 1/2}], {x, y}], {x,
0, 10}, {y, 0, 10}]]