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There is an error in this PLC program used to simulate traffic lights in automation studio. What is the error?
x0 t4 w1 tl w2 12 w3 N W4 tl H/F N 12 t3 ㅓㅜ == IN H/H PT IN PT IN PT IN PT tl t3 11 H/H %= %= x2 H/H *=*=*= H/H t4 H/F xl ㅓㅏ t3 H/H xl ㅓㅏ t4 = TON xl H/H TON TON TON H/F al Q ET Q ET M xl Q ET 24 Q ET H/F H/H H/F H/H xl -1/4 xl H/▬▬▬▬▬▬▬▬▬▬▬/F tl ( ) t3 t4 y10 yll y12 f X y13 ( ) y14 } } } y15 }