Singleton Pattern not returning same object in my Java Code

Is there any wrong in my Code. Because the variable not changing its value while applying Singleton Pattern.

My Code :

class Singleton{

private final static Supplier<Singleton> INSTANCE = Singleton::new;
private int variable = 33;


public static synchronized Supplier<Singleton> getInstance() { 
    return INSTANCE;
}

void print(){
    System.out.println(variable);
}

void change(int variable){
    this.variable = variable;
}

}

public class Design {

public static void main(String[] args) {
    Singleton.getInstance().get().print(); // print 33
    Singleton.getInstance().get().change(99);
    Singleton.getInstance().get().print(); // need to print 99 but it prints 33

}

}

Please correct me Guys, if I'm wrong in implement Singleton Pattern.