unsigned char cube_png[] = {
    0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
    0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x08,
    0x08, 0x06, 0x00, 0x00, 0x00, 0xc4, 0x0f, 0xbe, 0x8b, 0x00, 0x00, 0x00,
    0x2b, 0x49, 0x44, 0x41, 0x54, 0x18, 0x57, 0x63, 0x64, 0x60, 0x60, 0xf8,
    0xcf, 0x80, 0x07, 0x30, 0x82, 0x14, 0xd4, 0x33, 0x30, 0x30, 0x34, 0x60,
    0xc1, 0x20, 0x49, 0xb0, 0x02, 0x90, 0x11, 0xe8, 0x92, 0x20, 0xdc, 0x38,
    0x98, 0x4c, 0x80, 0xfb, 0x09, 0x0b, 0x00, 0x00, 0x41, 0x79, 0x1d, 0x01,
    0xd9, 0xf2, 0x1b, 0x87, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44,
    0xae, 0x42, 0x60, 0x82, 0x00, 0x00};
unsigned int cube_png_len = 102;