Sensing blocks

Sensing blocks read the world around a script: collisions, the mouse and keyboard, the timer, the date, and the properties of other sprites.

Touching and distance

touching mouse-pointer / edge / sprite ? reports whether the sprite is touching a target.
touching color [#color] ? reports whether the sprite touches a colour on screen.
color [#color] is touching [#color] ? reports whether one colour on the sprite touches another colour.
distance to mouse-pointer / sprite reports the distance in pixels.

ask What's your name? and wait shows an input box and pauses until the user answers.
answer reports the most recent answer.

mouse down? reports whether the mouse button is held.
mouse x / mouse y report the pointer's position.
key space pressed? reports whether a key is held.
set drag mode draggable / not draggable controls whether the player can drag this sprite.

loudness reports the microphone input level (0 to 100).
timer reports seconds since the timer last reset; reset timer sets it to zero.
backdrop # of Stage / property of sprite reports a property (x, y, direction, costume, size, volume, variables, and so on) of another sprite or the stage.
current year / month / date / day of week / hour / minute / second reports a piece of the current date and time.
days since 2000 reports the number of days (with fraction) since the year 2000.
username reports the signed-in player's username, when available.

online? This sensing_online boolean reports whether the device currently has a network connection (navigator.onLine).
stage width (sensing_stagewidth) reports the stage width in pixels (480 by default, but the stage size can be changed).
stage height (sensing_stageheight) reports the stage height in pixels (360 by default).

There is also a loudness > 10? style boolean used by the when ... > hat.