Junior's out somewhere jumping up and down on his Life Script, seeing what happens when you throw it to the ground this way, or throw it in the air that way. Transactional analysis says Junior received a "life script" at a very early age from his parents, other authority figures, and even significant peers his own age.
Junior wrote the script himself at a subconscious level, but the powerful voices of parents, patriarchs, matriarchs, and peers guided the pen he wrote with. These powerful voices, along with his own cognitive abilities, limited life experience as a child, and personal sense of "being OK" or "not OK" in the world have heavily influenced the storyline he has decided to live his life by.
But now that adolescence has come, or the transition from puberty to adulthood generally corresponding to the teenage years, Junior has thrown the life script out the window, laughing as his squealing tires chew it to pieces like so much toilet paper. Welcome to the Anti-Junior! Behold his "Antiscript"!
Junior has decided to wage full-scale rebellion against the values of parents and community, abandon the life script, live and antiscript in complete defiance to what has been written. The antiscript is simply the expressed rebellion of the adolescent or teenager against the injunctions, values, and drivers that influenced the life script. It may be generally characterized by typical patterns of rebellion, defiance, boundary-breaking, experimentation, and extreme or dangerous behaviors.
Although the counterscript may share some correlation with the antiscript, it differs in nuance with its particular interest in how the Parent ego state opposes the life script, and the issue of willpower in overcoming the rigid nature of the life script. The counterscript is typically viewed from the Parent ego state, whereas the antiscript is normally seen through the lens of the Child ego state.