 
      
      file::writestring()Write multiple bytes to the opened file (binary mode)
file::writestring(value, position)
value (string)  — Bytes to be written (in string sequence)position (number)  — Position where value will be written
boolean — Always returns true
import fileio
 
f = file("data.bin", file_binary + file_write)
f.writestring("Hello", 0x0)   ' Write 5 bytes to the position 0
f.close()