Very nice approach..!! But this solves only one of the problem. Because i want to place a label or a textbox to these places, and keep updating their values every 2 seconds.... This will be done through bluetooth. This app will constantly read temperatures from these 4 points and i thought that it would be nicer to have these values in the drawing instead of a single line.
Hope to find a solution...
p.s I am new user to appinventor and i really find it unbelievable to have such a big problem in so simple programming task. (placing text to a specific location at the screen...)