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We use a switch statement and case statements to run the logic relevant to the current piece. If it doesn’t, we continue into the dountil :dropped loop, which runs until the piece has fully ‘dropped’ into its final position.

Inside the dountil loop we choose the next Tetris piece to play, set a random fill color, set the starting position for the piece based on its characteristics (we don’t want it overlapping the edges or starting ‘over the top’) and ensure that the new piece doesn’t overlap an existing piece (if so, game over!) The game procedure begins with some basic initialization, such as creating the table we will use to note the finishing positions of the pieces, draws the border around the playfield and then proceeds into the main ‘run loop’, the dountil :gamover which loops until the gameover container is set to true. In this example, we handle most of the structure using dountil and switch / case - dountil loops its contents until a condition is true, while switch takes a value from a container (variable) and then case compares the value it is given with the switch, and executes its list if that condition is true. You can also view the example inside of turtleSpaces webLogo by clicking File -> Browse Published… after it finishes loading and selecting the Tetris project. While Logo is very versatile, sometimes aspects of that versatility such as the use of multiple procedures are unneeded.

The first thing you’ll notice is that it’s very monolithic, there’s only one procedure! That’s okay, though, in this context. They are collectibles.Īll right, so let’s take a look at the listing.

Nintendo sued, and Tengen was eventually forced to withdraw its cartridge from sale, after selling around 100,000 copies.

Nintendo’s version of Tetris for the NES was criticised for not having a two-player mode however, Atari Games, perhaps mistakenly believing their arcade licensing gave them the right to release a console version, came out with their own Nintendo Tetris game through their Tengen subsidiary (created after the consumer rights to the Atari name were sold to Jack Tramiel, see Point & Click) which featured head-to-head play. The inclusion of Tetris arguably made the Game Boy a success –the game was perfect for smaller screen sizes, and was very addictive, spawning a whole generation of Tetris ‘junkies’.

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Nintendo released Tetris on both its Nintendo Entertainment System and on the Game Boy, the latter as a pack-in with the portable console. They sold the arcade rights to Atari and the console rights to Nintendo. Holobyte’s version took next year’s CES by a storm, and garnered the attention of the Soviet government, who held the rights to the game. A little historyĪ lexey Pajitnov’s Tetris – early unauthorised versions of which, such as Spectrum Holobyte’s rendition described above, began appearing on home computers in 1987 – spawned a whole new generation of shape-based puzzle games. But Tetris would always remain king ( tsar?) of the arcade puzzle game world, with sequels, clones and variations being released for virtually every console, computer, and operating system worldwide. Tetris would inspire a number of other “falling block puzzle games” such as Sega’s colour-matching Columns, and the three-dimensional Welltris. In an era where games were becoming increasingly more complex, the simplicity of Tetris was seen as a breath of fresh air. When you finish a certain number of lines, the level ends… and in the next, the shapes fall faster, and you need to complete more lines! The insanity never ends. However, if you stack up shapes to the point they overflow the top of the playfield: Game Over. When you finish a line, it disappears, causing the rest of the blocks to fall down a line. Bush have in common? They’ve both been seriously into Tetris! But who can blame them? The object of the game (as if you didn’t know) is to complete horizontal lines using falling shapes of various configurations.

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