THE BEAUTIFUL C SNAKE

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <conio.h>

int i, ronaldo, max;
float vel;
int a = 1;
char b;

int main()
{
    system("COLOR 0A");

    init:
    ronaldo = 0;
    system("cls");
    printf("********************************\n");
    printf("**        WELCOME TO THE      **\n");
    printf("**         BEAUTIFUL C        **\n");
    printf("**          S N A K E         **\n");
    printf("**                            **\n");
    printf("**     |                 |    **\n");
    printf("**      | vel 2: slowest  |   **\n");
    printf("**       | vel 1: pattern  |  **\n");
    printf("**      |vel 0.1: fastest |   **\n");
    printf("**     |                 |    **\n");
    printf("********************************\n");

    printf("Digite o numero de espacos: ");
    scanf("%i", &max);

    scanVel:
    printf("Digite a velocidade <2 - 0.1>: ");
    scanf("%f", &vel);

    if (vel > 2 || vel < 0.1)
        goto scanVel;

    do {


        for (i = 0; i < ronaldo; i++)
            printf(" ");

        if(ronaldo == max) {
            a = 0;
        } else
        if (ronaldo == 0) {
            a = 1;
        }

        if (a)
            ronaldo++;
        else
            ronaldo--;

        if (kbhit()) {
            b = getch();
            goto init;
        }

        printf("|                  |\n");
        usleep(10000 * vel);

    } while(1);

    return 0;
}