Being on bail means that you have been arrested or charged with a crime and can leave the police station or court, but you must return / go to court on a specific day at a specific time. If you do not attend court you can be arrested.
Stay in the state of Texas until trial. Do not use any drugs prohibited by law or by the court (which even can include prescribed narcotics). Work at suitable employment. Report on a regular basis to a probation officer and notify such an officer of any address changes.