This is a suitable 51 single LED flashing program (roundtrip marquees)

往返跑马灯\2.c
..........\2.hex
..........\2.lnp
..........\2.LST
..........\2.M51
..........\2.Opt
..........\2.plg
..........\2.Uv2
..........\2_Opt.Bak
..........\2_Uv2.Bak
..........\STARTUP.A51
..........\STARTUP.LST
..........\STARTUP.OBJ
往返跑马灯

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