Example with all variables modifiable

---                                                                             
rougail:                                                                        
  var1:                                                                         
    - 0.0                                                                       
  var2:                                                                         
    - 0.0                                                                       
  var3:                                                                         
    - 0.0                                                                       
  var4:                                                                         
    - 10.1                                                                      
  var5:                                                                         
    - 10.1                                                                      
  var6:                                                                         
    - 10.1                                                                      
  var7:                                                                         
    - 0.0                                                                       
  var8:                                                                         
    - 0.0