ipst-se Wall Attack and turn Left

#include <ipst.h>   // IPST-SE Board
void setup() {OK();
}
void loop() {
   if(in(17)==0){
     while(in(19)==1){fd(60);}
     bk(30);delay(100);sl(25);delay(360);
   }
   else if(in(19)==0){
     while(in(17)==1){fd(60);}
     bk(30);delay(100);sl(25);delay(360);
   }
   else {fd(30);}
}