Licenses for Joshua David's images. License for sigonasr2_down_arrow.png: Public Domain License for sigonasr2_left_arrow.png: Public Domain License for sigonasr2_right_arrow.png: Public Domain License for sigonasr2_up_arrow.png: Public Domain License for sigonasr2_down_arrow2.png: Public Domain License for sigonasr2_left_arrow2.png: Public Domain License for sigonasr2_right_arrow2.png: Public Domain License for sigonasr2_up_arrow2.png: Public Domain License for sigonasr2_right_arrow2.png: Public Domain License for sigonasr2_soccer_sign.png: Public Domain License for sigonasr2_net.png: Public Domain License for sigonasr2_soccer_sign_mini.png: Public Domain License for sigonasr2_wall_snow.png: Public Domain License for sigonasr2_basketball_sign.png: Public Domain License for sigonasr2_bnet.png: Public Domain License for sigonasr2_bleach.png: Public Domain License for sigonasr2_floor.png: Public Domain License for sigonasr2_back.png: Public Domain License for sigonasr2_space4.png: Public Domain License for sigonasr2_space2.png: Public Domain