diff --git a/balloon/lib/basics.nas b/balloon/lib/basics.nas
deleted file mode 100644
index 0ad02c3..0000000
--- a/balloon/lib/basics.nas
+++ /dev/null
@@ -1,66 +0,0 @@
-# this file includes basic operation functions:
-# append
-# subvec
-# int
-# num
-# made by github user: ValKmjolnir
-
-# append is used to add a new var into an array/vector
-var append=func(vector,elements...)
-{
-    return __call_special_inline_function(vector,elements);
-};
-
-# subvec is used to get a new array from an exist array
-var subvec=func(vector,begin,length)
-{
-    var new_vector=[];
-    for(var i=begin;i<begin+length;i+=1)
-    {
-        append(new_vector,vector[i]);
-    }
-    return new_vector;
-};
-
-# int function is used to transfer double var into int var
-# the normal type of number in balloon script is double
-var int=func(value)
-{
-    return __Cpp_inline_var_to_int(value);
-};
-
-# num function is used to translate a string into a number
-var num=func(value)
-{
-    return __call_Cpp_type_trans_num(value);
-};
-
-# size function is used to count the number of members in an array
-var size=func(value)
-{
-    return __call_Cpp_value_count(value);
-};
-
-# rand function is used to make random float numbers between 0 and 1 ([0,1))
-# written by C: srand(unsigned(time(NULL))) rand()
-var rand=func()
-{
-    return __call_Cpp_rand();
-};
-
-# chars is used to split string into char vector
-# each member of this vector is a string which has only one char
-var chars=func(str)
-{
-    var char_vector=__call_Cpp_split_str_to_chars(str);
-    return char_vector;
-};
-
-# get the substring from the given string
-var substr=func(str,start,length)
-{
-    var temp='';
-    var char_split_str=chars(str);
-    for(var i=start;i<start+length;i+=1){temp~=char_split_str[i];}
-    return temp;
-};
\ No newline at end of file