1D

int a;

void setup(){

size(400,300);

background(250,150,150);

rectMode(CORNER);

fill(150,100,100);

stroke(230,230,230);

}

void draw(){

//atualiza o background

background(250,150,150);

//estrutura que controla a posição do rectangulo

if(a>400){

a=0;

}else{

a++;

}

//desenha o rectangulo atribuindo o valor da variavel a -> X

rect(a,150,100,100);

}

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