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    • The micro:bit will show a heart image that changes size—getting big and
                        small—making it look like it’s beating.

                        • You can see how coding makes the heartbeat continuously, like a real heart

                        pumps blood.
                     You will understand how to create moving pictures (animations) using simple

                     computer code.

                     Application

                     You may have noticed the heartbeat animation on
                     a smart watch when using the heart monitoring
                     function.  This  animation  visually  represents

                     your pulse, syncing with the beats detected by
                     the watch’s sensors.

                     Understanding Variables in Programming

                     Variable:  A  variable  in  programming  is  like  a

                     special container that holds information, such as

                     numbers, words, or data. Think of it as a labelled
                     box where you store something you want to use

                     later. In coding, variables can store values that

                     can change while the program is running.

                        • This program uses a variable called ‘count’ to
                        keep track of the number you’re counting.

                        • It sets the variable to 0 at the start.

                        • Every time you press button B, it increases the count variable by 1 and shows

                        it on the LED display.

                        • Numbers over 9 won’t stay on the display, so pressing button A shows the

                        number.
                        • You can reset the counter by pressing buttons A and B together.

                                                                                     Programming with Micro:bit    61

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