📟⚙️ 2. Building blocks of Micro: bit

Basic Block: Provide access to basic micro: bit functionality:

	💡 Shows number on LED screen; slides left for multiple digits. 🔄
	🖼️ Displays picture on LED screen.
	🖼️ Shows the selected icon on the LED screen.
	📜 Shows a string on the LED screen. It will scroll to left if it’s bigger than the screen.
	💡 Turns off all the LED lights on the LED screen.
	⏩ Keeps running part of a program in the background.
	🏁 An event that runs when the program starts.
	⏸️ Pauses the program for the number of milliseconds you say. You can use this function to slow your program down.
	➡️ Shows the selected arrow on the LED screen.

Input Block: Events and data from sensors:

	⮚     🎮 Event handler activates on button press. ⮚     🅰️ or 🅱️: Press and release within 1 sec; 🅰️ and 🅱️ together: press both, release one within 1.5 sec.
	⮚     🔄 Start event handler: Runs on specific gestures. ⮚     🤲 Gesture detection: Triggers actions, such as shaking the micro: bit.
	⮚     ⚡️👆 Event handler activates when pin 0, 1, or 2 is touched with GND, released within 1 second. ⮚     🖱️ Click pins on screen in web browser; completing circuit feels like being a big wire!
	🔍 Checks if button A or B is currently pressed on the micro: bit.
	📊 Retrieves acceleration values (milli g-force) in x, y, z dimensions or combined force.
	🔌 Hold GND pin with one hand and touch pin 0, 1, or 2 with other to complete circuit safely, allowing electricity flow through body.
	🔆 Measures light level from darkness (0) to bright light (255) using micro: bit’s LED screen; initially displays 0, then shows real light level after activating the light sensor.
	🧭📐 Micro: bit uses magnetometer chip to measure compass heading from 0 to 359 degrees, indicating north, east, south, and west directions.
	🌡️ Uses micro: bit to find nearby temperature by measuring computer chip heat in Celsius.
	✋🔍 Checks for gesture detection.
	🎤🔊 Runs code when microphone detects sound.
	⚙️ Runs some code when micro: bit logo is pressed, touched, or released.
	🖲️ Checks if micro: bit logo is currently pressed.
	🎤 Finds sound level heard by microphone.
	🔄 Finds tilt direction of micro: bit.
	🔍 Finds magnetic force in one direction.
	⏱️ Finds program duration in milliseconds.
	⏲️ Finds program duration in microseconds.
	🧭 Runs compass calibration sequence.
	🔌👋 Starts event handler when releasing pin 0, 1, or 2 together with GND; in browser, click and release pins instead; completing a circuit when touching pins while holding GND.
	🚀 Configures micro: bit acceleration sensor for measuring speed changes, whether high or low.
	🔊📏 Determines the sound level threshold for detection on your board.

Music Block: Generation of music tones:

	🎵 Plays a short melody of notes composed in a string.
	🎶 Plays a musical tone through pin P0 of the micro: bit for as long as you say.
	🔊 Plays a musical tone through pin P0 with the pitch as high or low as you say. The tone will keep playing until you tell it not to.
	🔇 Rest (plays no sound) through pin P0 for the amount of time you say.
	🔉 Sets the volume for the sound synthesizer.
	🔊 Gets the current volume level of the sound synthesizer.
	⏹️ Stops all the sounds that are playing right now and any others waiting to play.
	🎵 Makes the tempo (speed of a piece of music) faster or slower by the amount you say.
	🎶 Makes the tempo (speed of a piece of music) as fast or slow as you say.
	⏰ Returns the duration of a beat in milliseconds
	🎶 Finds the tempo (speed of a piece of music).
	🎵 Begins playing a musical melody through pin P0 of the micro: bit.
	⏹️ Stops playing a musical melody.
	🎵 Raises events for melodies or music events.
	🎵 Plays a sound that is generated from a sound expression.
	🎵 Plays a sound that is generated from a sound expression.
	🔊 Creates a sound expression string for a sound effect.
	🔊 Enables the speaker on the micro: bit to play music and sounds.

 Led Blocks: Control of the LED screens:

	🔆 Turns on the LED light at specified x, y coordinates on the LED screen.
	🔄 Toggles a LED light on the LED screen at specified x, y coordinates.
	🚫 Turns off the LED light at specified x, y coordinates on the LED screen.
	🔄 Toggles a LED light on the LED screen at specified x, y coordinates.
	🔍 Finds whether the LED at specified x, y coordinates on the LED screen is on or off.
	📊 Displays a bar graph for a number value.
	💡 Turns on a LED light with specific brightness at specified x, y coordinates on the LED screen.
	🔆 Reads the brightness of a LED at specified x, y coordinates on the LED screen.
	💡🔍 Finds the brightness of the LED screen when turned on.
	🔛🔇 Disables the LED
	⏹️ Stops the playing animation and any waiting animations.
	🖥️ Sets the display mode to either black and white or grayscale for rendering LEDs.

 Loops Blocks: Loops and repetition:

	🔄 Runs part of the program the number of times you say.
	🔁 Repeats code while a Boolean condition is true.
	🔂 Runs part of the program the number of times you say using an index variable.
	📜 Runs part of the program for each element in a list.
	⏱️ Runs part of the program in a loop continuously at a time interval.
	🛑 Breaks out of the current loop and continue the program.
	↪️ Skips the rest of the code in a loop and start the loop again.

Logic Blocks: Logic operators and constants:

	🔄 Runs code depending on Boolean condition is true
	🔄 Runs code depending on Boolean condition is true or false
	🔍 The blocks represent comparison operators yielding Boolean values. Most comparisons involve numbers.
	🔗 Conjunction (A and B): A and B evaluates to true if both A and B are true.
	🔗 Negation (Not A): not A evaluates to the opposite of A.
	✅ These blocks represent true and false Boolean values, pluggable wherever expected.

Variable Blocks: Creates variables and stores variables:

	🔢 Increases variable value by some amount.
	📝 Sets variable to store number or string.