No pair of consecutive 0's and 1's
(01+10)*
one pair of consecutive 1's
(01+10)* 11 (01+10)*
one pair of consecutive 0's
(01+10)* 00 (01+10)*
one pair of consecutive 1's and 0's
(01+10)* 00 (01+10)* 11 (01+10)* + (01+10)* 11 (01+10)* 00 (01+10)*
All Together
(01+10)* + (01+10)* 00 (01+10)* + (01+10)* 11 (01+10)* + (01+10)* 00 (01+10)* 11 (01+10)* + (01+10)* 11 (01+10)* 00 (01+10)*