Movement data display in Graph and Steps Counter

Actually getting user input can be a little tricky, so what I'd say is you get the user to type GOAL=40 rather than just 40:

var GOAL = 30;
print("What is your goal?");
Bluetooth.inject("GOAL="); // writes 'GOAL=' to the input line
// ...
if (steps == GOAL) print("Congratulations ... ");