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# A traffic light
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# A traffic light | |
Powered | |
power failed -> Unpowered | |
Green* | |
tick -> Yellow | |
Yellow | |
tick -> Red | |
Red | |
tick -> Green | |
Unpowered | |
power restored -> Powered | |
Red On* | |
tick -> Red Off | |
Red Off | |
tick -> Red On |
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//A function that draws individual traffic lights | |
function light(color, is_illuminated){ | |
return $('div', {style: {backgroundColor: color, | |
width: '20px', | |
height: '20px', | |
opacity: is_illuminated ? 1 : 0.2}}); | |
} | |
//A function that draws all of our lights, based on the statechart | |
function render(model){ | |
var active_light = model.active_states[0].name; | |
return $('div', | |
light('Red', active_light === 'Red' || active_light === 'Red On'), | |
light('Yellow', active_light === 'Yellow'), | |
light('Green', active_light === 'Green')); | |
} |
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