Create 4 arrays of numbers:
String1_X (0 to 31)
String1_Y (0 to 31)
String2_X (0 to 31)
String2_Y (0 to 31)

Initialise all the points in String_X() and String_Y():

Loop i from 0 to 31
    String1_X (i) = 0
    String1_Y (i) = i
end of loop

Loop Forever

    Loop i from 0 to 31

        X_vector1 = String1_X(i- 1) - String1_X(i)
        Y_vector1 = String1_Y(i - 1) - String1_Y(i)
        Magnitude1 = LengthOf (X_Vector1, Y_Vector1)
        Extension1 = Magnitude1 - Normal_Length

        X_vector2 = String1_X(i + 1) - String1_X(i)
        Y_vector2 = String1_Y(i + 1) - String1_Y(i)
        Magnitude2 = LengthOf(X_Vector2, Y_Vector2)
        Extension2 = Magnitude2 - Normal_Length

        xv = (X_Vector1 / Magnitude1 * Extension1) + (X_Vector2 / Magnitude2 * Extension2)
        yv = (Y_Vector1 / Magnitude1 * Extension1) + (Y_Vector2 / Magnitude2 * Extension2) + Gravity

        Velocity_X(i) = Velocity_X(i) * Damping + (xv * .001)
        Velocity_Y(i) = Velocity_Y(i) * Damping + (yv * .001)
        String2_X(i)  = String1_X(i) + Velocity_X(i)
        String2_Y(i)  = String1_Y(i) + Velocity_Y(i)
        (Note you can use what ever value you like instead of .01)

    end of loop

    Copy all of String2_X to String1_X
    Copy all of String2_Y to String1_Y
    Draw lines between all adjacent points

end of LoopForever