#include <SPI.h>                           
#include <SD.h>

File S;                                    
unsigned long A=0;
float B=0;
float C=0;

void setup()
{SD.begin(2);                             
pinMode(3,INPUT_PULLUP);}                 
  
void loop()                              
{A=(millis());                            
B=B+1.01;C=C+2.01;                        
if(digitalRead(3)==HIGH)                  
{S=SD.open("Test.csv",FILE_WRITE);        
S.print(A);S.print(" ");                  
S.print(B);S.print(" ");                  
S.print(C);S.println(" ");                
S.close();}                               
delay(1000);}