Huit interpreter

The following Python script is an incomplete Huit interpreter.

prgm = input('>Huit ')
prgm += "\0" # NUL is the EOF
# Finds the location of all jump points
names = []
points = []
j = 0
k = 0
name = ""
for i in range(0, len(prgm)):
    if k == 1 and prgm[i] != ")":
        name += prgm[i]
    if prgm[i] == "\"":
        if prgm[i-1] == "\\": # To read " but ignore \" # Bug here
            pass
        else: j = (j + 1) % 2
    if j == 0:
        if prgm[i] == "(":
            k = 1
        elif prgm[i] == ")":
            k = 0
            names.append(name)
            points.append(i)
            name = ""
replace = ['\\n','\n','\\t','\t','\\\"','\"','\\\'','\'']
# Executes the program
floats = ['0','1','2','3','4','5','6','7','8','9','.','-']
input_string = ""
input_float = 0
char = 0
queue = []
inst = 0
def deq(repeat):
    for i in range(0, repeat):
        queue.pop(0)
def enq(a):
    queue.append(a)
while inst < len(prgm):
    if prgm[inst] == "+":
        enq(queue[0] + queue[1])
        deq(2)
    elif prgm[inst] == "-":
        enq(queue[0] - queue[1])
        deq(2)
    elif prgm[inst] == "*":
        enq(queue[0] * queue[1])
        deq(2)
    elif prgm[inst] == "/":
        enq(queue[0] / queue[1])
        deq(2)
    elif prgm[inst] == "%":
        queue.append(queue[0] % queue[1])
        deq(2)
    elif prgm[inst] == "&":
        read = ""
        if prgm[inst+1] == "\"":
            inst += 2
            while not (prgm[inst] == "\"" and prgm[inst-1] != "\\"): # Bug here
                read += prgm[inst]
                inst += 1
            for i in range(0, len(replace), 2): # Bug here
                read = read.replace(replace[i], replace[i+1])
            enq(read)
        else:
            inst += 1
            start = inst
            while prgm[inst] in floats:
                if prgm[inst] == '-' and inst != start:
                    break # To not read minus instructions.
                read += prgm[inst]
                inst += 1
            enq(float(read))
            inst -= 1
    elif prgm[inst] == ":":
        enq(queue[0])
    elif prgm[inst] == "?":
        if len(queue) > 0:
            deq(1)
    elif prgm[inst] == "(":
        while prgm[inst] != ")":
            inst += 1
    # [] is missing
    elif prgm[inst] == ">":
        if prgm[inst+1] == "\'":
            if type(queue[0]) == float:
                queue[0] = chr(int(queue[0]))
        print(queue[0])
        deq(1)
    elif prgm[inst] == "<":
        if prgm[inst+1] == "\'":
            input_float = input('> ')
            enq(input_float)
        else:
            if input_string == "":
                input_string = input('> ')
                char = 0
            enq(input_string[char])
            char += 1
    elif prgm[inst] == "#": # Debug character
        print("inst: %s, queue: %s" % (inst, queue))
        # Add strings to input format
    else:
        pass
    inst += 1