Use an embedded switch statement to execute steps

  - 
  
 step1 
 : 
  
 assign 
 : 
  
 - 
  
 a 
 : 
  
 1 
 - 
  
 step2 
 : 
  
 switch 
 : 
  
 - 
  
 condition 
 : 
  
 ${a==1} 
  
 steps 
 : 
  
 - 
  
 stepA 
 : 
  
 assign 
 : 
  
 - 
  
 a 
 : 
  
 ${a+7} 
  
 - 
  
 stepB 
 : 
  
 return 
 : 
  
 ${"increase a to:"+string(a)} 
 - 
  
 step3 
 : 
  
 return 
 : 
  
 ${"default a="+string(a)}