3.1

to start

loop

[

if ( in o ) [ note 2 10 ]

if ( in 1 ) [ note 62 10 ]

]

end

3.2

to start

loop

[

   ab, thisway

   ab, on

   if  ( in 0 )

   [ ab, thatway

     wait 5

     a, thisway

     wait 2 ]

]

end

3.3

to left

ab, thatway wait 5

a, thisway wait 2

end

to right

ab, thatway wait 5

b, thisway wait 2

end

to start

loop [ ab, thisway ab, on

if ( in 0 ) [ left ]

if ( in 1 ) [ right ] ]

end

4.1

to start 

loop [ send (sensor 0 ) ]

end

4.2

to start

ab, setpower 1

loop [

ifelse ( ( sensor 0 ) > 450 )

[ ab, thisway ab, on ]

[ a, thatway b, thisway ab, onfor 1 ]

]

end

4.3

global [ LDR ]

to start

   ab, setpower 2

   wait 10

   setLDR (sensor 0 )

   setLDR ( LDR + 50 )

   wait 10

   loop [ ifelse ( ( sensor 0 ) > LDR )

   [ ab, thisway

     ab, on ]

   [ a, thatway

     b, thisway

     ab, onfor 1 ] ]

end

4.4

global [ LDRO LDR1 ]

to start

   loop [ ab, setpower 2

   wait 10

   setLDR0 ( ( sensor 0 ) + 60 )

   setLDR1 ( ( sensor 1 ) + 60)

   wait 5

loop [

   if ( ( sensor 0 ) < LDR0

   and ( ( sensor 1 ) < LDR1 ) )

   [ b,  on ]

   if ( ( sensor 0 ) > LDR 0 )

   [ a, onfor 3 ]

   if ( ( sensor 1 ) > LDR1 )

   [ b, onfor 3 ] ]

       ]

end