SOLVED: Seeedstudio BT Shield

Yo i've a problem ! i want to connect two Bluetooth shield together but i don't know any thing on arduino ! so I serch on internet for code example but i'ven't find any things ! I try this:

#include <SoftwareSerial.h>

#define BT_TX 4
#define BT_RX 5

SoftwareSerial mySerial(BT_RX, BT_TX);

void setup()
{
 Serial.begin(9600);
 mySerial.begin(9600);
 
}

void loop()
{
}

That is true, but i don't know what i do take in void loop !
please help x'D