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Forever and repeat can be used for iteration (repeating a series of instructions)
the variable blocks allow you to create variables and use them in a program. the bariables can store numbers or strings.
'When key pressed' and 'when sprite clicked' are examples of event handling - responding to events triggered by the user or another part of the program.
threads (parallel execution)
Launching two stacks at the same time creates two independent threads that execute in parallel.
Coordination and synchronization
'broadcast' and 'when I receive' can coordinate the actions of multiple sprites. Using 'broadcast and wait' allows synchronization
'mouse_x, mouse_y, loudness' can be used as dynamic input for real time interaction
user interface design
you can design interactive user interfaces in Scratch, for example, using clickable sprites to create buttons.
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