Answer Posted / rajesh rajan

I am also faced same situation and i made a logic like this


[ ]
[----[ ]---i---[\]-------------( )--]
[ PB i M2 O/P ]
[ i ]
[----( )---i ]
[ O\P ]
[ ]
[----( )---[\]-i-[\]-----------( )--]
[ O\P PB i M2 M1 ]
[ i ]
[----[ ]-------i ]
[ M1 ]
[ ]
[ ]
[----[ ]---i---[ ]-------------( )--]
[ M1 i PB M2 ]
[ i ]
[----[ ]---i ]
[ M2 ]
[ ]

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